List of Catholic dioceses (alphabetical)

This is a growing list of territorial dioceses and ordinariates in communion with the Holy See. There are approximately 3,000 actual (i.e., non-titular) dioceses in the Catholic Church (including the eparchies of the Eastern Catholic Churches).
 * Those dioceses which are (metropolitan or nominal) archdioceses (including archeparchies) are marked in bold type and are also listed at List of Catholic archdioceses.
 * Those dioceses which belong to Eastern Catholic Churches (often called "eparchies") are italicized and their particular Churches and proper episcopal titulature are specified after the see name.
 * Missionary and other special types of circumscriptions (e.g., apostolic prefectures) are also specified before the country name.

Alphabetical list of geographic dioceses
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A

 * Aachen (Aix-la-chapelle), Germany
 * Aba, Nigeria
 * Abaetetuba, Brazil
 * Abakaliki, Nigeria
 * Abancay, Peru
 * Abengourou, Côte d'Ivoire
 * Abeokuta, Nigeria
 * Aberdeen, Scotland, United Kingdom
 * Abidjan, Côte d'Ivoire
 * Abomey, Benin
 * Abuja, Nigeria
 * Acapulco, Mexico
 * Acarigua-Araure, Venezuela
 * Accra, Ghana
 * Acerenza, Italy
 * Acerra, Italy
 * Achonry, Ireland
 * Acireale, Italy
 * Acqui, Italy
 * Addis Abeba, Ethiopian Catholic Archeparchy, Ethiopia
 * Adelaide, Australia
 * Adigrat, Ethiopia
 * Adilabad, India
 * Adria-Rovigo, Italy
 * Afogados da Ingazeira, Brazil
 * Agaña, Guam
 * Agartala, India
 * Agats, Indonesia
 * Agboville, Côte d'Ivoire
 * Agen, France
 * Agra, India
 * Agrigento, Italy
 * Aguarico, Apostolic Vicariate, Ecuador
 * Aguascalientes, Mexico
 * Ahiara, Nigeria
 * Ahmedabad, India
 * Ahvaz (Ahwaz), Chaldean Catholic, Iran
 * Aiquile, Territorial Prelature, Bolivia
 * Aire-et-Dax, France
 * Aitape, Papua New Guinea
 * Aix-Arles-Embrun, France
 * Aix-la-chapelle: see Aachen
 * Aizawl, India
 * Ajaccio, France
 * Ajmer, India
 * Akka, Melkite Archeparchy, Israel
 * Alagoinhas, Brazil
 * Alajuela, Costa Rica
 * Alaminos, Philippines
 * Alba Pompeia, Italy
 * Alba Iulia, Romania
 * Albacete, Spain
 * Albano, Italy
 * Albany, United States
 * Albenga-Imperia, Italy
 * Albi, France
 * Alcalá de Henares, Spain
 * Alep (Melkite)*, Syria
 * Aleppo (Syrian Catholic),*, Syria
 * Aleppo (Maronite),*, Syria
 * Aleppo (Armenian),*, Syria
 * Aleppo, Chaldean Catholic*, Syria
 * Alep(po), Apostolic Vicariate (Roman Catholic), Syria
 * Alessandria, Italy
 * Ales-Terralba, Italy
 * Alexandria of Egypt(-Heliopolis-Port Said), Apostolic Vicariate, Egypt
 * Alexandria (Iskanderiya), Armenian Catholic Eparchy, Egypt
 * Alexandria-Cornwall, Canada
 * Alexandria in Louisiana, United States
 * Algiers, Algeria
 * Alghero-Bosa, Italy
 * Alife-Caiazzo, Italy
 * Alindao, Central African Republic
 * Aliwal, South Africa
 * Allahabad, India
 * Allentown, United States
 * Alleppey, India
 * Almenara, Brazil
 * Almería, Spain
 * Alotau-Sideia, Papua New Guinea
 * Alquoch, Chaldean Catholic Eparchy, Iraq
 * Altamura-Gravina-Acquaviva delle Fonti, Italy
 * Alto Solimões, Brazil
 * Alto Valle del Río Negro, Argentina
 * Altoona-Johnstown, United States
 * Amadiyah, Chaldean Catholic Eparchy, Iraq
 * Amalfi-Cava de' Tirreni, Italy
 * Amargosa, Brazil
 * Amarillo, United States
 * Ambanja, Madagascar
 * Ambato, Ecuador
 * Ambatondrazaka, Madagascar
 * Ambikapur, India
 * Amboina, Indonesia
 * Ambositra, Madagascar
 * Amiens, France
 * Amos, Canada
 * Amparo, Brazil
 * Amravati, India
 * Anagni-Alatri, Italy
 * Anápolis, Brazil
 * Anatolia, Apostolic Vicariate, (Asian) Turkey
 * Añatuya, Argentina
 * Anchorage, United States
 * Ancona-Osimo, Italy
 * Andong, South Korea
 * Andria, Italy
 * Aného, Togo
 * Angers, France
 * Angoulême, France
 * Angra, Portugal
 * Anking, China
 * Ankwo, China
 * Annecy, France
 * Annunciation of Ibadan, Maronite Catholic Eparchy, Nigeria
 * Anse-à-Veau and Miragoâne, Haiti
 * Antananarivo, Madagascar
 * Antélias, Lebanon
 * Antequera, Mexico
 * Antigonish, Canada
 * Antipolo, Philippines
 * Antofagasta, Chile
 * Antsirabe, Madagascar
 * Antsiranana, Madagascar
 * Antwerp, Belgium
 * Anuradhapura, Sri Lanka
 * Aosta, Italy
 * Aparecida, Brazil
 * Apartadó, Colombia
 * Apatzingan, Mexico
 * Apucarana, Brazil
 * Aqra, Chaldean Catholic Eparchy, Iraq
 * Aracajú, Brazil
 * Araçatuba, Brazil
 * Araçuaí, Brazil
 * Arauca, Colombia
 * Arbil, see Erbil, Iraq
 * Archipelago of the Comores (Archipel des Comores), Apostolic Vicariate, Comoros (& Mayotte)
 * Ardagh, Ireland
 * Arecibo, Puerto Rico
 * Arequipa, Peru
 * Arezzo-Cortona-Sansepolcro, Italy
 * Argyll and the Isles, Scotland
 * Ariano Irpino-Lacedonia, Italy
 * Arica, Chile
 * Arlington, United States
 * Armagh, Northern Ireland
 * Armenia, Colombia
 * Armidale, Australia
 * Arras, France
 * Arua, Uganda
 * Arundel and Brighton, United Kingdom
 * Arusha, Tanzania
 * Asansol, India
 * Ascoli Piceno, Italy
 * Asmara, Eritrean Catholic Archeparchy, Eritrea
 * Assis, Brazil
 * Assisi-Nocera Umbra-Gualdo Taldino, Italy
 * Assiut, Coptic Catholic suffragan, Egypt
 * Asti, Italy
 * Astorga, Spain
 * Asunción, Paraguay
 * Atakpamé, Togo
 * Atambua, Indonesia
 * Athens, Greece
 * Atlacomulco, Mexico
 * Atlanta, United States
 * Atyrau, Apostolic Administration, Kazakhstan
 * Auch, France
 * Auchi, Nigeria
 * Auckland, New Zealand
 * Augsburg, Germany
 * Auki, Solomon Islands
 * Aurangabad, India
 * Austin, United States
 * Autlán, Mexico
 * Autun, France
 * Aveiro, Portugal
 * Avellaneda-Lanús, Argentina
 * Avellino, Italy
 * Aversa, Italy
 * Avezzano, Italy
 * Avignon, France
 * Avila, Spain
 * Awasa (Hawassa), Apostolic Vicariate, Ethiopia
 * Awgu, Nigeria
 * Awka, Nigeria
 * Ayacucho, Peru
 * Ayaviri, Territorial Prelature, Peru
 * Aysén, Apostolic Vicariate, Chile
 * Azogues, Ecuador
 * Azul, Argentina

B

 * Baalbek, Melkite*, Lebanon
 * Baalbek – Deir El-Ahmar, Maronite*, Lebanon
 * Bà Rịa, Vietnam
 * Babahoyo, Ecuador
 * Bacabal, Brazil
 * Bắc Ninh, Vietnam
 * Bacolod, Philippines
 * Baku, Apostolic prefecture, (for all) Azerbaijan
 * Badulla, Sri Lanka
 * Bafang, Cameroon
 * Bafatá, Guinea-Bissau
 * Bafia, Cameroon
 * Bafoussam, Cameroon
 * Bagdogra, India
 * Bagé, Brazil
 * Baghdad (Armenian), Iraq
 * Baghdad (Latin), Iraq
 * Baguio, Philippines
 * Bahía Blanca, Argentina
 * Bahir Dar-Dessie, Ethiopian Catholic Eparchy, Ethiopia
 * Baie-Comeau, Canada
 * Baker, United States
 * Balanga, Philippines
 * Balasore, India
 * Ballarat, Australia
 * Balsas, Brazil
 * Baltimore, United States
 * Bamako, Mali
 * Bambari, Central African Republic
 * Bamberg, Germany
 * Bamenda, Cameroon
 * Bandung, Indonesia
 * Banfora, Burkina Faso
 * Bangalore, India
 * Bangassou, Central African Republic
 * Bangkok, Thailand
 * Bangued, Philippines
 * Bangui, Central African Republic
 * Baní, Dominican Republic
 * Baniyas, Melkite Catholic ?ArchEparchy, Lebanon
 * Banja Luka, Bosnia and Herzegovina
 * Banjarmasin, Indonesia
 * Banjul, Gambia
 * Banmaw, Myanmar
 * Ban Mê Thuôt, Vietnam
 * Banská Bystrica, Slovakia
 * Baoding, China PR
 * Baoqing (Paoking, Shaoyang), Apostolic prefecture, China PR
 * Bar, Montenegro
 * Barahona, Dominican Republic
 * Barbastro–Monzón, Spain
 * Barcelona, Spain
 * Barcelona, Venezuela
 * Bareilly, India
 * Barentu, Eritrea
 * Bari-Bitonto, Italy
 * Barinas, Venezuela
 * Baroda, India
 * Barquisimeto, Venezuela
 * Barra, Brazil
 * Barra do Garças, Brazil
 * Barra do Piraí–Volta Redonda, Brazil
 * Barrancabermeja, Colombia
 * Barranquilla, Colombia
 * Barreiras, Brazil
 * Barretos, Brazil
 * Baruipur, India
 * Basankusu, Democratic Republic of the Congo
 * Basel, Switzerland
 * Basse-Terre(-Pointe-à-Pitre), Guadeloupe (French)
 * Bassorah, Basra, Chaldean Catholic ?Archeparchy, Iraq
 * Bata, Equatorial Guinea
 * Batanes, Territorial Prelature, Philippines
 * Bathery, India
 * Bathurst (in Australia), Australia
 * Bathurst (in Canada), Canada
 * Baton Rouge, United States
 * Batouri, Cameroon
 * Battambang, Apostolic Prefecture, Cambodia
 * Batticaloa, Sri Lanka
 * Baucau, Timor-Leste
 * Bauchi, Nigeria
 * Bauru, Brazil
 * Bayeux, France
 * Bayombong, Philippines
 * Bayonne, France
 * Beatissima Vergine Maria del SS.mo Rosario (Blessed Virgin of the Most Sacred Rosary) aka Pompei, Territorial Prelature, Brazil
 * Beaumont, United States
 * Beauvais-Noyons-Senlis, France
 * Beihai, China
 * Beijing, China
 * Beira, Mozambique
 * Beirut (Armenian), Armenian Catholic ?Archeparchy, Lebanon
 * Beirut, Chaldean Catholic, Lebanon
 * Beirut (Maronite), ?Archeparchy, Lebanon
 * Beirut, Apostolic Vicariate, Latin, Lebanon
 * Beirut and Byblos (Melkite), ?Archeparchy, Lebanon
 * Beja, Portugal
 * Belém do Pará, Brazil
 * Belfort-Montbéliard, France
 * Belgaum, India
 * Belize City-Belmopan, Belize
 * Bellary, India
 * Belleville, United States
 * Belley-Ars, France
 * Belluno-Feltre, Italy
 * Belo Horizonte, Brazil
 * Belthangady, Syro-Malabar Catholic Eparchy, India
 * Benevento, Italy
 * Bengbu, China
 * Benghazi, Apostolic Vicariate, Libya
 * Benguela, Angola
 * Benin City, Nigeria
 * Benjamín Aceval, Paraguay
 * Beograd, Serbia
 * Berbérati, Central African Republic
 * Bereina, Papua New Guinea
 * Bergamo, Italy
 * Berhampur, India
 * Berlin, Germany
 * Bertoua, Cameroon
 * Besançon, France
 * Bethlehem, South Africa
 * Bettiah, India
 * Bhadravathi, India
 * Bhagalpur, India
 * Bhopal, India
 * Białystok, Poland
 * Bida, Nigeria
 * Biella, Italy
 * Bielsko–Żywiec, Poland
 * Bijnor, India
 * Bilbao, Spain
 * Biloxi, United States
 * Birmingham, United Kingdom
 * Birmingham, United States
 * Bismarck, United States
 * Bissau, Guinea-Bissau
 * Bari-Bitonto, Italy
 * Bjelovar-Križevci, Croatia
 * Blantyre, Malawi
 * Assumption of the Blessed Virgin Mary in Strumica-Skopje, Macedonian Catholic Eparchy, North Macedonia
 * Blessed Virgin of the Most Sacred Rosary (Beatissima Vergine Maria del SS.mo Rosario) aka Pompei, Territorial Prelature, Brazil
 * Bloemfontein, South Africa
 * Blois, France
 * Bluefields, Nicaragua
 * Blumenau, Brazil
 * Bo, Sierra Leone
 * Boac, Philippines
 * Bobo-Dioulasso, Burkina Faso
 * Bocas del Toro, Territorial Prelature, Panama
 * Bogor, Indonesia
 * Bogotá, Colombia
 * Boise, United States
 * Bokungu–Ikela, Democratic Republic of the Congo
 * Bologna, Italy
 * Bolzano-Brixen, Italy
 * Boma, Democratic Republic of the Congo
 * Bomadi, Nigeria
 * Bombay, India
 * Bom Jesus da Lapa, Brazil
 * Bom Jesus do Gurguéia, Brazil
 * Bondo, Democratic Republic of the Congo
 * Bondoukou, Ivory Coast (Côte d'Ivoire)
 * Bonfim, Brazil
 * Bongaigaon, India
 * Bontoc-Lagawe, Apostolic Vicariate, Philippines
 * Borba, Brazil
 * Bordeaux, France
 * Borongan, Philippines
 * Bostra and Hauran, Melkite Greek Catholic Archeparchy, Syria
 * Bossangoa, Central African Republic
 * Boston, United States
 * Botucatu, Brazil
 * Bouaké, Côte d'Ivoire
 * Bouar, Central African Republic
 * Bougainville, Papua New Guinea
 * Bourges, France
 * Braga, Portugal
 * Bragança do Pará, Brazil
 * Bragança–Miranda, Portugal
 * Bragança Paulista, Brazil
 * Brasília, Brazil
 * Bratislava, Slovakia
 * Bratislava, Slovak Catholic Eparchy, Slovakia'
 * Brazzaville, Republic of the Congo
 * Breda, Netherlands
 * Brejo, Brazil
 * Brentwood, United Kingdom
 * Brescia, Italy
 * Bridgeport, United States
 * Bridgetown, Barbados
 * Brindisi–Ostuni, Italy
 * Brisbane, Australia
 * Brno, Czech Republic
 * Broken Bay, Australia
 * Brooklyn, United States
 * Broome, Australia
 * Brownsville, United States
 * Bruges (Brugge), Belgium
 * Brunei Darussalam, Apostolic Vicariate, Brunei
 * Bubanza, Burundi
 * Bucaramanga, Colombia
 * Buchach, Ukrainian Catholic Eparchy, Ukraine
 * București (Bucharest), Romania
 * Budjala, Democratic Republic of the Congo
 * Buéa, Cameroon
 * Buenaventura, Colombia
 * Buenos Aires, Argentina
 * Buffalo, United States
 * Buga, Colombia
 * Bùi Chu, Vietnam
 * Bujumbura, Burundi
 * Bukavu, Democratic Republic of the Congo
 * Bukoba, Tanzania
 * Bulawayo, Zimbabwe
 * Bunbury, Australia
 * Bunda, Tanzania
 * Bungoma, Kenya
 * Bunia, Democratic Republic of the Congo
 * Burgos, Spain
 * Burlington, United States
 * Bururi, Burundi
 * Busan: see Pusan
 * Buta, Democratic Republic of the Congo
 * Butare, Rwanda
 * Butembo-Beni, Democratic Republic of the Congo
 * Butuan, Philippines
 * Buxar, India
 * Byblos, Maronite*, Lebanon
 * Bydgoszcz, Poland
 * Byumba, Rwanda

C

 * Caacupé, Paraguay
 * Cabanatuan, Philippines
 * Cabimas, Venezuela
 * Cabinda, Angola
 * Caçador, Brazil
 * Caceres, Philippines
 * Cachoeira do Sul, Brazil
 * Cachoeiro de Itapemirim, Brazil
 * Cádiz y Ceuta, Spain
 * Caetité, Brazil
 * Cafayate, Territorial Prelature, Argentina
 * Cagayan de Oro, Philippines
 * Cagliari, Italy
 * Caguas, Puerto Rico
 * Cahors, France
 * Caicó, Brazil
 * Cairns, Australia
 * Cairo (Maronites), Egypt
 * Cairo (Chaldean Catholic), Egypt
 * Cairo (Syrians), Egypt
 * Cairo (Melkite), Territory Dependent on the Patriarch, Egypt
 * Cajamarca, Peru
 * Cajazeiras, Brazil
 * Cajenna: see Cayenne
 * Calabar, Nigeria
 * Calabozo, Venezuela
 * Calahorra y La Calzada–Logroño, Spain
 * Calapan, Apostolic Vicariate, Philippines
 * Calbayog, Philippines
 * Calcutta, India
 * Caldas, Colombia
 * Calgary, Canada
 * Cali, Colombia
 * Calicut, India
 * Callao, Peru
 * Caltagirone, Italy
 * Caltanissetta, Italy
 * Camaçari, Brazil
 * Camagüey, Cuba
 * Cambrai, France
 * Camden, United States
 * Camerino–San Severino Marche, Italy
 * Camiri, Apostolic Vicariate, Bolivia
 * Campanha, Brazil
 * Campeche, Mexico
 * Camiri, Apostolic Vicariate, Bolivia
 * Campina Grande, Brazil
 * Campinas, Brazil
 * Campobasso–Boiano, Italy
 * Campo Grande, Brazil
 * Campo Limpo, Brazil
 * Campo Maior, Brazil
 * Campo Mourão, Brazil
 * Campos, Brazil
 * Canada, Syrian Catholic Apostolic Exarchate, for all Canada
 * Canberra and Goulburn, Australia
 * Cancun-Chetumal, Territorial Prelature, Mexico
 * Candia, Greece
 * Canelones, Uruguay
 * Cân Tho, Vietnam
 * Caozhou, China
 * Cape Coast, Ghana
 * Cape Palmas, Liberia
 * Cape Town, South Africa
 * Cap-Haïtien, Haiti
 * Capiz, Philippines
 * Capua, Italy
 * Carabayllo, Peru
 * Caracas, Venezuela
 * Caraguatatuba, Brazil
 * Carapeguá, Paraguay
 * Caratinga, Brazil
 * Caravelí, Territorial Prelature, Peru
 * Carcassonne et Narbonne, France
 * Cardiff, United Kingdom
 * Carolina, Brazil
 * Caroline Islands, Federated States of Micronesia & Palau
 * Caroní, Apostolic Vicariate, Venezuela
 * Carora, Venezuela
 * Carpi, Italy
 * Cartagena, Colombia
 * Cartagena, Spain
 * Cartago, Colombia
 * Cartago, Costa Rica
 * Caruaru, Brazil
 * Carúpano, Venezuela
 * Casale Monferrato, Italy
 * Cascavel, Brazil
 * Caserta, Italy
 * Cashel and Emly, Ireland
 * Cassano all'Jonio, Italy
 * Castanhal, Brazil
 * Castellaneta, Italy
 * Castries, Saint Lucia
 * Catamarca, Argentina
 * Catanduva, Brazil
 * Catania, Italy
 * Catanzaro–Squillace, Italy
 * Catarman, Philippines
 * Caucasus, Apostolic Administration at Tbilisi, Georgia
 * Caxias do Maranhão, Brazil
 * Caxias do Sul, Brazil
 * Caxito, Angola
 * Cayenne (Cajenna), French Guiana
 * Cebu, Philippines
 * Cefalù, Italy
 * Celaya, Mexico
 * Celje, Slovenia
 * Cerignola–Ascoli Satriano, Italy
 * Cerreto Sannita–Telese–Sant'Agata de' Goti, Italy
 * Cesena-Sarsina, Italy
 * České Budějovice, Czech Republic
 * Chachapoyas, Peru
 * Chaco Paraguayo, Apostolic Vicariate, Paraguay
 * Chalan Kanoa, Northern Mariana Islands
 * Chalatenango, El Salvador
 * Châlons, France
 * Chambéry–Saint-Jean-de Maurienne–Tarentaise, France
 * Chanda, India
 * Changanacherry, India
 * Changde, China
 * Changsha, China
 * Chanthaburi, Thailand
 * Chaotung (Zhaotong), Apostolic Prefecture, China PR
 * Chapecó, Brazil
 * Charleston, United States
 * Charlotte, United States
 * Charlottetown, Canada
 * Chartres, France
 * Chascomús, Argentina
 * Cheju (Jeju), South Korea
 * Chengde, China
 * Chengdu, China
 * Cheongju (Ch'ŏngju), South Korea
 * Chernivtsi, Ukrainian Catholic Eparchy, Ukraine
 * Cheyenne, United States
 * Chiang Mai, Thailand
 * Chiang Rai, Thailand
 * Chiavari, Italy
 * Chicago, United States
 * Chiclayo, Peru
 * Chicoutimi, Canada
 * Chieti-Vasto, Italy
 * Chifeng, China
 * Chihuahua, Mexico
 * Chikmagalur, India
 * Chikwawa, Malawi
 * Chilaw, Sri Lanka
 * Chillán, Chile
 * Chilpancingo–Chilapa, Mexico
 * Chimbote, Peru
 * Chimoio, Mozambique
 * Chingleput, India
 * Chinhoyi, Zimbabwe
 * Chioggia, Italy
 * Chios, Greece
 * Chipata, Zambia
 * Chiquinquirá, Colombia
 * Chişinău, Moldova
 * Chitré, Panama
 * Chittagong, Bangladesh
 * Choluteca, Honduras
 * Chongqing, China
 * Chŏnju: see Jeonju
 * Ch'ŏngju: see Cheongju
 * Chosica, Panama
 * Chota, Territorial Prelature, Peru
 * Christchurch, New Zealand
 * Chulucanas, Peru
 * Chunchun (Ch'unch'on/ Chuncheon/ Chunchon), North & South Korea
 * Chuquibamba, Territorial Prelature, Peru
 * Chuquibambilla, Territorial Prelature, Peru
 * Chur, Switzerland
 * Churchill-Baie d'Hudson, Canada
 * Ciego de Avila, Cuba
 * Cienfuegos, Cuba
 * Cincinnati, United States
 * Città di Castello, Italy
 * Ciudad Altamirano, Mexico
 * Ciudad Bolívar, Venezuela
 * Ciudad del Este, Panama
 * Ciudad Guayana, Venezuela
 * Ciudad Guzmán, Mexico
 * Ciudad Juárez, Mexico
 * Ciudad Lázaro Cárdenas, Mexico
 * Ciudad Obregón, Mexico
 * Ciudad Quesada, Costa Rica
 * Ciudad Real, Spain
 * Ciudad Rodrigo, Spain
 * Ciudad Valles, Mexico
 * Ciudad Victoria, Mexico
 * Civita Castellana, Italy
 * Civitavecchia–Tarquinia, Italy
 * Clermont, France
 * Cleveland, United States
 * Clifton, United Kingdom
 * Clogher, Ireland
 * Clonfert, Ireland
 * Cloyne, Ireland
 * Cluj-Gherla, Romania
 * Coatzacoalcos, Mexico
 * Cochabamba, Bolivia
 * Cochin, India
 * Coimbatore, India
 * Coimbra, Portugal
 * Colatina, Brazil
 * Cologne, Germany
 * Colima, Mexico
 * Colombo, Sri Lanka & Maldives
 * Colón–Kuna Yala, Panama
 * Colorado Springs, United States
 * Colombia, Maronite Catholic Apostolic Exarchate, for all Colombia
 * Columbus, United States
 * Comayagua, Honduras
 * Como, Italy
 * Comodoro Rivadavia, Argentina
 * Conakry, Guinea
 * Concepción, Chile
 * Concepción, Argentina
 * Concepción, Paraguay
 * Concordia, Argentina
 * Concordia-Pordenone, Italy
 * Constantine, Algeria
 * Conversano-Monopoli, Italy
 * Copenhagen, Denmark
 * Copiapó, Chile
 * Córdoba, Argentina
 * Córdoba, Spain
 * Córdoba, Mexico
 * Corfù–Zante–Cefalonia, Greece
 * Coria–Cáceres, Spain
 * Cork and Ross, Ireland
 * Cornélio Procópio, Brazil
 * Corner Brook and Labrador, Canada
 * Coro, Venezuela
 * Coroatá, Brazil
 * Corocoro, Territorial Prelature, Bolivia
 * Coroico, Bolivia
 * Coronel Oviedo, Paraguay
 * Corpus Christi, United States
 * Corrientes, Argentina
 * Corumbá, Brazil
 * Cosenza–Bisignano, Italy
 * Cotabato, Philippines
 * Cotonou, Benin
 * Coutances, France
 * Covington, United States
 * Coxim, Brazil
 * Crateús, Brazil
 * Crato, Brazil
 * Crema, Italy
 * Cremona, Italy
 * Créteil, France
 * Criciúma, Brazil
 * Crimea (Krym), at Simferopol, Ukrainian Catholic Archiepiscopal Exarchate, Ukraine 
 * Cristalândia, Brazil
 * Crookston, United States
 * Crotone–Santa Severina, Italy
 * Cruz Alta, Brazil
 * Cruz das Almas, Brazil
 * Cruz del Eje, Argentina
 * Cruzeiro do Sul, Brazil
 * Cuauhtémoc-Madera, Mexico
 * Cuautitlán, Mexico
 * Cubao, Philippines
 * Cúcuta, Colombia
 * Cuddapah, India
 * Cuenca, Ecuador
 * Cuenca, Spain
 * Cuernavaca, Mexico
 * Cuiabá, Brazil
 * Culiacán, Mexico
 * Cumaná, Venezuela
 * Cuneo, Italy
 * Curitiba, Brazil
 * Curitiba, São João Batista – (Ukrainian), Ukrainian Catholic Archeparchy, Brazil
 * Curitiba, São João Batista – (Latin): See São João Batista em Curitiba
 * Cuttack-Bhubaneswar, India
 * Cuzco, Peru
 * Cyangugu, Rwanda
 * Cyprus (Maronite), at *, Cyprus
 * Częstochowa, Poland

D

 * Daegu: see Taegu
 * Daejeon (Taejŏn), South Korea
 * Daet, Philippines
 * Dakar, Senegal
 * Đakovo-Osijek, Croatia
 * Dali, China PR
 * Đà Lạt, Vietnam
 * Dallas, United States
 * Daloa, Côte d'Ivoire
 * Daltonganj, India
 * Damascus (Syriac)*, Syria
 * Damascus (Maronite), Syria
 * Daming, China
 * Damongo, Ghana
 * Đà Nẵng, Vietnam
 * Danlí, Honduras
 * Dapaong, Togo
 * Dar es Salaam, Tanzania
 * Darién, Apostolic Vicariate, Panama
 * Darjeeling, India & Bhutan
 * Daru-Kiunga, Papua New Guinea
 * Darwin, Australia
 * Dassa-Zoumé, Benin
 * Datong, China
 * Daule, Ecuador
 * Davao, Philippines
 * Davenport, United States
 * David, Panama
 * De Aar, South Africa
 * Deán Funes, Territorial Prelature, Argentina
 * Debrecen-Nyíregyháza, Hungary
 * Dédougou, Burkina Faso
 * Dedza, Malawi
 * Delhi, India
 * Denpasar, Indonesia
 * Denver, United States
 * Derna, Apostolic Vicariate, Libya
 * Derry, Northern Ireland
 * Des Moines, United States
 * Detroit, United States
 * Dhaka, Bangladesh
 * Dharmapuri, India
 * Diamantina, Brazil
 * Diamantino, Brazil
 * Diarbekir, Chaldean Catholic Archeparchy, Turkey
 * Dibrugarh, India
 * Diébougou, Burkina Faso
 * Digne, France
 * Digos, Philippines
 * Dijon, France
 * Díli, East Timor (Timor-Leste)
 * Dinajpur, Bangladesh
 * Dindigul, India
 * Diphu, India
 * Dipolog, Philippines
 * Divinópolis, Brazil
 * Djibouti, Djibouti
 * Djougou, Benin
 * Doba, Chad
 * Dodoma, Tanzania
 * Dodge City, United States
 * Dolisie, Republic of the Congo
 * Doko, Nigeria
 * Donghai (Haichow / Haizhou), Apostolic prefecture, China PR
 * Donetsk, Ukrainian Catholic Archiepiscopal Exarchate, Ukraine 
 * Donkorkrom, Apostolic Vicariate, Ghana
 * Dori, Burkina Faso
 * Doruma–Dungu, Democratic Republic of the Congo
 * Douala, Cameroon
 * Doumé–Abong' Mbang, Cameroon
 * Dourados, Brazil
 * Down and Connor, Northern Ireland
 * Dresden-Meißen, Germany
 * Drohiczyn, Poland
 * Dromore, Northern Ireland
 * Dublin, Ireland
 * Dubrovnik, Croatia
 * Dubuque, United States
 * Duitama-Sogamoso, Colombia
 * Duluth, United States
 * Dumaguete, Philippines
 * Dumka, India
 * Dundee, South Africa
 * Dundo, Angola
 * Dunedin, New Zealand
 * Dunkeld, Scotland
 * Duque de Caxias, Brazil
 * Durango, Mexico
 * Durban, South Africa

E

 * East Anglia, United Kingdom
 * Ebebiyin, Equatorial Guinea
 * Ebolowa-Kribi, Cameroon
 * Ecatepec, Mexico
 * Edéa, Cameroon
 * Edmonton, Canada
 * Edmonton, Ukrainian Catholic Eparchy, Canada
 * Edmundston, Canada
 * Eger, Hungary
 * Eichstätt, Germany
 * Eisenstadt, Austria
 * Ekiti, Nigeria
 * El Alto, Bolivia
 * El Banco, Colombia
 * El Beni, Apostolic Vicariate, Bolivia
 * Elbląg, Poland
 * Eldoret, Kenya
 * Ełk, Poland
 * El Nayar (Jesús María d'), Territorial Prelature, Mexico
 * El Obeid, Sudan
 * El Paso, United States
 * El Petén, Apostolic Vicariate, Guatemala
 * Elphin, Ireland
 * El Salto, Territorial Prelature, Mexico
 * El Tigre, Venezuela
 * Eluru, India
 * El Vigia–San Carlos del Zulia, Venezuela
 * Embu, Kenya
 * Emdeber, Ethiopian Catholic Eparchy, Ethiopia
 * Encarnación, Paraguay
 * Ende, Indonesia
 * Engativá, Colombia
 * Ensenada, Mexico
 * Enugu, Nigeria
 * Erexim, Brazil
 * Erfurt, Germany
 * Erie, United States
 * Ernakulam-Angamaly, Syro-Malabar Catholic Archeparchy, India
 * Escuintla, Guatemala
 * Eséka, Cameroon
 * Eshowe, South Africa
 * Esmeraldas, Apostolic Vicariate, Ecuador
 * Espinal, Colombia
 * Esquel, Territorial Prelature, Argentina
 * Essen, Germany
 * Estância, Brazil
 * Estelí, Nicaragua
 * Estonia, Apostolic Administration, at Tallinn, in and for all Estonia
 * Esztergom-Budapest, Hungary
 * Eunápolis, Brazil
 * Evansville, United States
 * Evinayong, Equatorial Guinea
 * Évora, Portugal
 * Évreux, France
 * Évry-Corbeil-Essonnes, France



F

 * Facatativá, Colombia
 * Fada N'Gourma, Burkina Faso
 * Făgăraş (and Alba Iulia), Romanian 'Greek' Catholic Archeparchy, Romania
 * Faenza–Modigliana, Italy
 * Fairbanks, United States
 * Faisalabad, Pakistan
 * Fajardo-Humacao, Puerto Rico
 * Falkland Islands, Apostolic Prefecture, Falkland Islands (UK)
 * Fall River, United States
 * Fano–Fossombrone–Cagli–Pergola, Italy
 * Farafangana, Madagascar
 * Fabriano–Matelica, Italy
 * Fargo, United States
 * Faridabad, Syro-Malabar Catholic Eparchy, India
 * Faro, Portugal
 * Feira de Santana, Brazil
 * Feldkirch, Austria
 * Fengxian, China
 * Fenoarivo Atsinanana, Madagascar
 * Fengyang, China
 * Fermo, Italy
 * Ferns, Ireland
 * Ferrara-Comacchio, Italy
 * Fianarantsoa, Madagascar
 * Fidenza, Italy
 * Fiesole, Italy
 * Florence, Italy
 * Florencia, Colombia
 * Floresta, Brazil
 * Floriano, Brazil
 * Florianópolis, Brazil
 * Florida, Uruguay
 * Foggia-Bovino, Italy
 * Foligno, Italy
 * Fontibón, Colombia
 * Forlì–Bertinoro, Italy
 * Formosa(e), Argentina
 * Formosa (Formosensis), Brazil
 * Fortaleza, Brazil
 * Fort-de-France, Martinique
 * Fort-Liberté, Haiti
 * Fort Portal, Uganda
 * Fort Wayne-South Bend, United States
 * Fort Worth, United States
 * Fossano, Italy
 * Foz do Iguaçu, Brazil
 * Franca, Brazil
 * Franceville, Gabon
 * Francistown, Botswana
 * Frascati, Italy
 * Frederico Westphalen, Brazil
 * Freetown, Sierra Leone
 * Freiburg im Breisgau, Germany
 * Fréjus-Toulon, France
 * Fresno, United States
 * Frosinone–Veroli–Ferentino, Italy
 * Fukuoka, Japan
 * Fulda, Germany
 * Funchal, Portugal
 * Funing, China
 * Fushun, China
 * Fuzhou, China

G

 * Gaborone, Botswana
 * Gaeta, Italy
 * Gagnoa, Côte d'Ivoire
 * Galápagos, Apostolic Vicariate, Botswana
 * Galle, Sri Lanka
 * Galloway, United Kingdom
 * Gallup, United States
 * Galveston-Houston, United States
 * Galway and Kilmacduagh, Ireland
 * Gambella, Apostolic Vicariate, Ethiopia
 * Gamboma, Republic of the Congo
 * Gandhinagar, India
 * Ganzhou, China
 * Gaoua, Burkina Faso
 * Gap, France
 * Garagoa, Colombia
 * Garanhuns, Brazil
 * Garissa, Kenya
 * Garoua, Cameroon
 * Gary, United States
 * Garzón, Colombia
 * Gaspé, Canada
 * Gatineau, Canada
 * Gaylord, United States
 * Gbarnga, Liberia
 * Gdańsk, Poland
 * Geita, Tanzania
 * Genova, Italy
 * Gent: see Ghent
 * Georgetown, Guyana
 * Geraldton, Australia
 * Getafe, Spain
 * Ghent (Gent), Belgium
 * Gibraltar, Gibraltar
 * Gikongoro, Rwanda
 * Girardot, Colombia
 * Girardota, Colombia
 * Girona, Spain
 * Gitega, Burundi
 * Gizo, Solomon Islands
 * Glasgow, United Kingdom
 * Gliwice, Poland
 * Gniezno, Poland
 * Goa and Daman, India
 * Goaso, Ghana
 * Goiânia, Brazil
 * Goiás, Brazil
 * Gokwe, Zimbabwe
 * Goma, Democratic Republic of the Congo
 * Gorakhpur, Syro-Malabar Eparchu, India
 * Goré, Chad
 * Gorizia, Italy
 * Görlitz, Germany
 * Goroka, Papua New Guinea
 * Gospić–Senj, Croatia
 * Governador Valadares, Brazil
 * Goya, Argentina
 * Gozo, Malta
 * Grajaú, Brazil
 * Granada, Spain
 * Granada in Colombia, Colombia
 * Granada, Nicaragua
 * Grand-Bassam, Côte d'Ivoire
 * Grand Falls, Canada
 * Grand Island, United States
 * Grand Rapids, United States
 * Graz-Seckau, Austria
 * Great Britain, Syro-Malabar Catholic Eparchy, England, Scotland & Wales (UK)
 * Great Falls-Billings, United States
 * Green Bay, United States
 * Greensburg, United States
 * Gregorio de Laferrere, Argentina
 * Grenoble–Vienne, France
 * Grodno, Belarus
 * Groningen-Leeuwarden, Netherlands
 * Grosseto, Italy
 * Grouard-McLennan, Canada
 * Guadalajara, Mexico
 * Guadix, Spain
 * Guajará-Mirim, Brazil
 * Gualeguaychú, Argentina
 * Guanare, Venezuela
 * Guangzhou, China
 * Guanhães, Brazil
 * Guantánamo–Baracoa, Cuba
 * Guapi, Apostolic Vicariate, Colombia
 * Guarabira, Brazil
 * Guaranda, Ecuador
 * Guarapuava, Brazil
 * Guarda, Portugal
 * Guarenas, Venezuela
 * Guarulhos, Brazil
 * Guatemala, Guatemala
 * Guaxupé, Brazil
 * Guayaquil, Ecuador
 * Gubbio, Italy
 * Guide, China
 * Guilian (Kweilin), Apostolic prefecture, China PR
 * Guiratinga, Brazil
 * Guiyang, China
 * Guizeh, Coptic Catholic suffragan Eparchy, Egypt
 * Gulbarga, India
 * Gulu, Uganda
 * Gumaca, Philippines
 * Gumla, India
 * Guntur, India
 * Gurk, Austria
 * Gurué, Mozambique
 * Guwahati, India
 * Gwalior, India
 * Gwanju: see Kwanju
 * Gweru, Zimbabwe
 * Győr, Hungary

H

 * Haarlem-Amsterdam, Netherlands
 * La Habana, San Cristóbal de, Cuba
 * Haichow (Donghai/ Haizhou), Apostolic prefecture, China PR
 * Haifa, Maronite, Israel
 * Haimen, China
 * Hainan, Apostolic prefecture, China PR
 * Hai Phòng, Vietnam
 * Haizhou (Donghai/ Haichow), Apostolic prefecture, China PR
 * Hajdúdorog, Hungarian Greek Catholic Archeparchy, Hungary
 * Hakha, Myanmar
 * Halifax, Canada
 * Hallam, United Kingdom
 * Hamburg, Germany
 * Hamhung (Hamhŭng), North Korea
 * Hamilton (in Bermuda), Bermuda
 * Hamilton, Canada
 * Hamilton, New Zealand
 * Hangzhou, China
 * Hankou, China
 * Hà Nôi, Vietnam
 * Hanyang, China
 * Hanzhong, China
 * Hap-an, Myanmar
 * Harar, Apostolic Vicariate, Ethiopia
 * Harare, Zimbabwe
 * Harbin, Apostolic Administration, China PR
 * Harbin, Russian Catholic Apostolic Exarchate, China PR
 * Harrisburg, United States
 * Hartford, United States
 * Hassaké-Nisibi, Syrian Catholic ?Archeparchy, Syria
 * Hasselt, Belgium
 * Havana: see (San Cristóbal de) La Habana
 * Hawassa (Awasa), Apostolic Vicariate, Ethiopia
 * Hazaribag, India
 * Hearst–Moosonee, Canada
 * Helena, United States
 * Helsinki, Finland
 * Hengzhou, China
 * Hermosillo, Mexico
 * Hexham and Newcastle, United Kingdom
 * Hildesheim, Germany
 * Hinche, Haiti
 * Hiroshima, Japan
 * Ho, Ghana
 * Ho Chi Minh City, Vietnam
 * Hobart, Australia
 * Hoima, Uganda
 * Holguín, Cuba
 * Holy Family of London, Ukrainian Catholic Eparchy for all Great Britain, UK
 * Homa Bay, Kenya
 * Homs (Melkite)*, Syria
 * Homs (Syriac)*, Syria
 * Hongdong, China PR
 * Hong Kong, China PR (autonomous status)
 * Honiara, Solomon Islands
 * Honolulu, United States
 * Hosanna, Apostolic Vicariate, Ethiopia
 * Hosur (Syro-Malabar), India
 * Houma-Thibodaux, United States
 * Hradec Králové, Czech Republic
 * Hsinchu, Taiwan
 * Huacho, Peru
 * Huajuapan de León, Mexico
 * Huamachuco, Territorial Prelature, Peru
 * Huambo, Angola
 * Huancavélica, Peru
 * Huancayo, Peru
 * Huánuco, Peru
 * Huautla, Territorial Prelature, Mexico
 * Huaraz, Peru
 * Huế, Vietnam
 * Huehuetenango, Guatemala
 * Huejutla, Mexico
 * Huelva, Spain
 * Huesca, Spain
 * Humahuaca, Territorial Prelature, Argentina
 * Humaitá, Brazil
 * Hưng Hóa, Vietnam
 * HHvar-Brac-Vis, Croatia
 * Hwalien, Taiwan
 * Hwange, Zimbabwe
 * Hyderabad, India
 * Hyderabad, Pakistan

I

 * Iaşi, Romania
 * Iba, Philippines
 * Ibadan, Nigeria
 * Ibagué, Colombia
 * Ibarra, Ecuador
 * Ibiza, Spain
 * Ica, Peru
 * Idah, Nigeria
 * Idiofa, Democratic Republic of the Congo
 * Idukki, India
 * Ifakara, Tanzania
 * Iglesias, Italy
 * Iguatu, Brazil
 * Ihosy, Madagascar
 * Ijebu-Ode, Nigeria
 * Ikot Ekpene, Nigeria
 * Ilagan, Philippines
 * (Iles) Saint-Pierre et Miquelon, Apostolic Vicariate, Saint-Pierre and Miquelon (French)
 * Ilhéus, Brazil
 * Iligan, Philippines
 * Illapel, Territorial Prelature, Chile
 * Ilorin, Nigeria
 * Imaculada Conceição in Prudentópolis, Ukrainian Catholic Eparchy, Brazil
 * Imola, Italy
 * Imperatriz, Brazil
 * Impfondo, Republic of the Congo
 * Imphal, India
 * Imus, Philippines
 * Incheon (Inch'ŏn), South Korea
 * Indianapolis, United States
 * Indias Occidentales, Titular Patriarchal See of the East Indies, vested in Goa and Daman, at the primatial see of Goa, India
 * Indore, India
 * Infanta, Territorial Prelature, Philippines
 * Ingwavuma, Apostolic Vicariate, South Africa
 * Inhambane, Mozambique
 * Inírida, Apostolic Vicariate, Colombia
 * Innsbruck, Austria
 * Inongo, Democratic Republic of the Congo
 * Ipameri, Brazil
 * Ipiales, Colombia
 * Ipil, Philippines
 * Iquique, Chile
 * Iquitos, Apostolic Vicariate, Peru
 * Irapuato, Mexico
 * Irecê, Brazil
 * Iringa, Tanzania
 * Irinjalakuda, India
 * Isangi, Democratic Republic of the Congo
 * Isabela, Territorial Prelature, Philippines
 * Ischia, Italy
 * Isernia-Venafro, Italy
 * Isiolo, Apostolic Vicariate, Kenya
 * Isiro–Niangara, Democratic Republic of the Congo
 * Iskanderiya: see Alexandria, Egypt
 * Islamabad–Rawalpindi, Pakistan
 * Islas Canarias, Spain
 * Ispahan, Armenian Catholic Eparchy, Iran
 * Issele-Uku, Nigeria
 * Istanbul (Latin) (formerly Constantinople), Apostolic Vicariate, Turkey
 * Istmina–Tadó, Colombia
 * Itabira–Fabriciano, Brazil
 * Itabuna, Brazil
 * Itacoatiara, Territorial Prelature, Brazil
 * Itaguaí, Brazil
 * Itaituba, Territorial Prelature, Brazil
 * Itanagar, India
 * Itapetininga, Brazil
 * Itapeva, Brazil
 * Itapipoca, Brazil
 * Ituiutaba, Brazil
 * Itumbiara, Brazil
 * Ivano-Frankivsk, Ukrainian Catholic Metropolitan Archeparchy, Ukraine
 * Ivrea, Italy
 * Izabal, Apostolic Vicariate, Guatemala
 * Izcalli, Mexico
 * Izmir, Turkey

J

 * Jabalpur, India
 * Jaboticabal, Brazil
 * Jaca, Spain
 * Jacarezinho, Brazil
 * Jackson, United States
 * Jacmel, Haiti
 * Jaén, Spain
 * Jaén en Perú (San Francisco Javier), Apostolic Vicariate, Peru
 * Jaffna, Sri Lanka
 * Jagdalpur, Syro-Malabar Catholic Eparchy, India
 * Jaipur, India
 * Jakarta, Indonesia
 * Jalapa, Guatemala
 * Jales, Brazil
 * Jalingo, Nigeria
 * Jalpaiguri, India
 * Jammu-Srinagar, India
 * Jamshedpur, India
 * Janaúba, Brazil
 * Januária, Brazil
 * Jardim, Brazil
 * Jaro, Philippines
 * Jashpur, India
 * Jasikan, Ghana
 * Jataí, Brazil
 * Jayapura, Indonesia
 * Jefferson City, United States
 * Jeju: Cheju
 * Jelgava, Latvia
 * Jeonju (Chŏnju), South Korea
 * Jequié, Brazil
 * Jérémie, Haiti
 * Jerez de la Frontera, Spain
 * Jericó, Colombia
 * Jesi, Italy
 * Jesús María ((d)El Nayar), Territorial Prelature, Mexico
 * Jhabua, India
 * Jhansi, India
 * Jiamusi (Kiamusze), Apostolic prefecture, China PR
 * Jiangmen, China
 * Jian'ou (Jianning/ Kienning / Kienow), Apostolic prefecture, China PR
 * Jilin, China
 * Jimma–Bonga, Apostolic Vicariate, Ethiopia
 * Jinan, China
 * Jinja, Uganda
 * Jinotega, Nicaragua
 * Ji-Paraná, Brazil
 * Jinzhou, China
 * Joaçaba, Brazil
 * Johannesburg, South Africa
 * Joinville, Brazil
 * Joliet in Illinois, United States
 * Joliette, Canada
 * Jolo, Apostolic Vicariate, Philippines
 * Jos, Nigeria
 * Jowai, India
 * Juazeiro, Brazil
 * Juba, Sudan
 * Juigalpa, Nicaragua
 * Juína, Brazil
 * Juiz de Fora, Brazil
 * Jujuy, Argentina
 * Jalandhar, India
 * Juli, Territorial Prelature, Peru
 * Jundiaí, Brazil
 * Juneau, United States
 * (San Francisco de Asís de) Jutiapa, Guatemala
 * Juticalpa, Honduras

K

 * Kabale, Uganda
 * Kabankalan, Philippines
 * Kabgayi, Rwanda
 * Kabinda, Democratic Republic of the Congo
 * Kabwe, Zambia
 * Kaduna, Nigeria
 * Kafanchan, Nigeria
 * Kaga–Bandoro, Central African Republic
 * Kagoshima, Japan
 * Kahama, Tanzania
 * Kaifeng, China
 * Kaišiadorys, Lithuania
 * Kakamega, Kenya
 * Kalamazoo, United States
 * Kalay, Burma
 * Kalemie–Kirungu, Democratic Republic of the Congo
 * Kalibo, Philippines
 * Kalisz, Poland
 * Kalocsa–Kecskemét, Hungary
 * Kalookan, Philippines
 * Kalyan, India
 * Kamichlié, Armenian Catholic Eparchy at Qamishli, Syria
 * Kamina, Democratic Republic of the Congo
 * Kamloops, Canada
 * Kampala, Uganda
 * Kamyanets-Podilsky, Ukraine
 * Kamyanets-Podilskyi, Ukrainian Catholic Eparchy, Ukraine
 * Kananga, Democratic Republic of the Congo
 * Kandi, Benin
 * Kandy, Sri Lanka
 * Kangding, China
 * Kanjirapally, Syro-Malabar Catholic Eparchy, India
 * Kankan, Guinea
 * Kannur, India
 * Kano, Nigeria
 * Kansas City, United States
 * Kansas City-Saint Joseph, United States
 * Kaohsiung, Taiwan
 * Kaolack, Senegal
 * Kaposvár, Hungary
 * Kara, Togo
 * Karachi, Pakistan
 * Karaganda, Kazakhstan
 * Karonga, Malawi
 * Karwar, India
 * Kasama, Zambia
 * Kasana–Luweero, Uganda
 * Kasese, Uganda
 * Kasongo, Democratic Republic of the Congo
 * Katiola, Côte d'Ivoire
 * Katowice, Poland
 * Kaunas, Lithuania
 * Kavieng, Papua New Guinea
 * Kaya, Burkina Faso
 * Kayes, Mali
 * Keetmanshoop, Namibia
 * Keewatin-Le Pas, Canada
 * Keimoes–Upington, South Africa
 * Kenema, Sierra Leone
 * Kenge, Democratic Republic of the Congo
 * Kengtung, Myanmar
 * Keningau, Malaysia
 * Kerema, Papua New Guinea
 * Keren (Eritrean Catholic epearchy), Eritrea
 * Kericho, Kenya
 * Kerkūk (Chaldean archeparchy), Iraq
 * Kerry, Ireland
 * Keta-Akatsi, Ghana
 * Ketapang, Indonesia
 * Khadki, Saint Ephrem of -, Syro-Malankara Catholic Exarchate, India
 * Khammam, India
 * Khandwa, India
 * Kharkiv, Ukrainian Catholic Archiepiscopal Exarchate, Ukraine 
 * Kharkiv-Zaporizhzhia, Ukraine
 * Khartoum, Sudan
 * Khulna, Bangladesh
 * Khunti, India
 * Kiamusze (Jiamusi), Apostolic prefecture, China PR
 * Kiayi, Taiwan
 * Kibungo, Rwanda
 * Kidapawan, Philippines
 * Kielce, Poland
 * Kienning (Jianning/ Jian'ou / Kienow), Apostolic prefecture, China PR
 * Kigali, Rwanda
 * Kigoma, Tanzania
 * Kikwit, Democratic Republic of the Congo
 * Kildare and Leighlin, Ireland
 * Killala, Ireland
 * Killaloe, Ireland
 * Kilmore, Ireland & United Kingdom
 * Kilwa–Kasenga, Democratic Republic of the Congo
 * Kimbe, Papua New Guinea
 * Kimberley, South Africa
 * Kindu, Democratic Republic of the Congo
 * Kingston, Canada
 * Kingston in Jamaica, Jamaica
 * Kingstown, Saint Vincent and Grenadines
 * Kinkala, Republic of the Congo
 * Kinshasa, Democratic Republic of the Congo
 * Kisangani, Democratic Republic of the Congo
 * Kisantu, Democratic Republic of the Congo
 * Kisii, Kenya
 * Kisumu, Kenya
 * Kitale, Kenya
 * Kitui, Kenya
 * Kiyinda–Mityana, Uganda
 * Klerksdorp, South Africa
 * Knoxville, United States
 * København: see Copenhagen
 * Koforidua, Ghana
 * Kohima, India
 * Kokstad, South Africa
 * Kolda, Senegal
 * Kole, Democratic Republic of the Congo
 * Kolomyia, Ukrainian Catholic Eparchy, Ukraine
 * Kolwezi, Democratic Republic of the Congo
 * Kompong Cham, Apostolic prefecture, Cambodia
 * Kondoa, Tanzania
 * Kongolo, Democratic Republic of the Congo
 * Konongo–Mampong, Ghana
 * Kontagora, Nigeria
 * Kontum, Vietnam
 * Koper, Slovenia
 * Korhogo, Côte d'Ivoire
 * Košice, Slovakia
 * Košice, Slovak Catholic Eparchy, Slovakia
 * Koszalin-Kołobrzeg, Poland
 * Kota Kinabalu, Malaysia
 * Kothamangalam, India
 * Kotido, Uganda
 * Kotor, Montenegro
 * Kottapuram, India
 * Kottar, India
 * Kottayam, India
 * Koudougou, Burkina Faso
 * Koupéla, Burkina Faso
 * Kpalimé, Togo
 * Kraków, Poland
 * Krishnagar, India
 * Križevci (Croatian Catholic eparchy), Croatia
 * Krk, Croatia
 * Kroonstad, South Africa
 * Krym (Crimea), at Simferopol, Ukrainian Catholic Archiepiscopal Exarchate, Ukraine
 * Kuala Lumpur, Malaysia
 * Kuching, Malaysia
 * Kumasi, Ghana
 * Kumbakonam, India
 * Kumba, Cameroon
 * Kundiawa, Papua New Guinea
 * Kunming, China
 * Kupang, Indonesia
 * Kurnool, India
 * Kurunegala, Sri Lanka
 * Kuzhithurai, India
 * Kwangju (Gwanju), South Korea
 * Kweilin (Guilian), Apostolic prefecture, China PR
 * Kwito-Bié, Angola
 * Kyiv (Kiev, Kiew), Ukrainian Catholic (proper Metropolitanate of the Major Archdiocese), Ukraine
 * Kyiv–Halych (at Kiev, Kiew), the Ukrainian Catholic Major Archdiocese, Ukraine
 * Kyiv–Zhytomyr, Ukraine
 * Kyoto, Japan
 * Kyrgyzstan, Apostolic Administration, at Bishkek, in and for all Kyrgyzstan

L

 * La Crosse, United States
 * Lábrea, Territorial Prelature, Brazil
 * La Dorada-Guaduas, Colombia
 * Lae, Papua New Guinea
 * Lafayette in Indiana, United States
 * Lafayette in Louisiana, United States
 * Lafia, Nigeria
 * Lages, Brazil
 * Laghouat, Algeria
 * Lagos, Nigeria
 * La Guaira, Venezuela
 * Lahore, Pakistan
 * Lai, Chad
 * Lake Charles, United States
 * Lamego, Portugal
 * Lamezia Terme, Italy
 * Lancaster, United Kingdom
 * Lanciano-Ortona, Italy
 * Lạng Sơn and Cao Bằng, Vietnam
 * Langres, France
 * Lansing, United States
 * Lanusei, Italy
 * Lanzhou, China
 * Laoag, Philippines
 * Laohekou, China
 * La Paz, Bolivia
 * La Paz en la Baja California Sur, Mexico
 * La Plata, Argentina
 * L'Aquila, Italy
 * Larantuka, Indonesia
 * Laredo, United States
 * La Rioja, Argentina
 * La Rochelle, France
 * Las Cruces, United States
 * La Serena, Chile
 * Lashio, Myanmar
 * La Spezia–Sarzana–Brugnato, Italy
 * Las Vegas, United States
 * Latacunga, Ecuador
 * Latakia, Maronite Eparchy, Syria
 * Latakia (Melkites), Syria
 * Latina–Terracina–Sezze–Priverno, Italy
 * Lausanne, Genève et Fribourg, Switzerland
 * Laval, France
 * La Vega, Dominican Republic
 * Lecce, Italy
 * Leeds, United Kingdom
 * Legazpi, Philippines
 * Legnica, Poland
 * Le Havre, France
 * Leiria–Fátima, Portugal
 * Le Mans, France
 * León, Spain
 * León, Mexico
 * León, Nicaragua
 * Leopoldina, Brazil
 * Le Puy-en-Velay, France
 * Leribe, Lesotho
 * Les Cayes, Haiti
 * Les Gonaïves, Haiti
 * Leticia, Apostolic Vicariate, Colombia
 * Lexington, United States
 * Lezhë, Albania
 * Líbano-Honda, Colombia
 * Libmanan, Philippines
 * Libreville, Gabon
 * Lichinga, Mozambique
 * Liège, Belgium
 * Liepāja, Latvia
 * Lille, France
 * Lilongwe, Malawi
 * Lima, Peru
 * Limburg, Germany
 * Limeira, Brazil
 * Limerick, Ireland
 * Limoeiro do Norte, Brazil
 * Limoges, France
 * Limón, Costa Rica
 * Linares, Mexico
 * Linares, Chile
 * Lincoln, United States
 * Lindi, Tanzania
 * Lingayen-Dagupan, Philippines
 * Lins, Brazil
 * Linz, Austria
 * Lipa, Philippines
 * Lira, Uganda
 * Lisala, Democratic Republic of the Congo
 * Lisbon, Portugal
 * Lishui, China
 * Lismore, Australia
 * Litoměřice, Czech Republic
 * Little Rock, United States
 * Liverpool, United Kingdom & Isle of Man
 * Livingstone, Zambia
 * Livorno, Italy
 * Livramento de Nossa Senhora, Brazil
 * Ljubljana, Slovenia
 * Lleida, Spain
 * Locri-Gerace, Italy
 * Lodi, Italy
 * Lodwar, Kenya
 * Łódź, Poland
 * Loikaw, Myanmar
 * Loja, Ecuador
 * Lokoja, Nigeria
 * Lokossa, Benin
 * Lolo, Democratic Republic of the Congo
 * Lomas de Zamora, Argentina
 * Lomé, Togo
 * Łomża, Poland
 * London, Canada
 * London, Holy Family of, Ukrainian Catholic Eparchy for all Great Britain, UK
 * Londrina, Brazil
 * Long Xuyên, Vietnam
 * Lorena, Brazil
 * Loreto, Territorial Prelature, Italy
 * Los Altos, Quetzaltenango–Totonicapán, Guatemala
 * Los Ángeles, Chile
 * Los Angeles, United States
 * Los Teques, Chile
 * Louisville, United States
 * Łowicz, Poland
 * Luoyang, China
 * Lu'an, China
 * Luanda, Angola
 * Luang Prabang, Apostolic Vicariate, Laos
 * Lubango, Angola
 * Lubbock, United States
 * Lublin, Poland
 * Lubumbashi, Democratic Republic of the Congo
 * Lucca, Italy
 * Lucena, Philippines
 * Lucera-Troia, Italy
 * Lucknow, India
 * Luçon, France
 * Luebo, Democratic Republic of the Congo
 * Lugano, Switzerland
 * Lugazi, Uganda
 * Lugo, Spain
 * Lugoj, Romania
 * Luiza, Democratic Republic of the Congo
 * Lulong, China
 * Lungro, Italo-Albanese Eparchy, Italy
 * Luoyang, China
 * Lurín, Peru
 * Lusaka, Zambia
 * Lutsk (Latin), Ukraine
 * Lutsk, Ukrainian Catholic Archiepiscopal Exarchate, Ukraine 
 * Luxembourg, Luxembourg
 * Luz, Brazil
 * Luziânia, Brazil
 * Lviv (Armenian), Ukraine
 * Lviv (Latin), Ukraine
 * Lviv, Ukrainian Catholic Metropolitanate, Ukraine
 * Lwena, Angola
 * Lyon, France



M

 * Maasin, Philippines
 * Macau, Macao
 * Macapá, Brazil
 * Maceió, Brazil
 * Macerata–Tolentino–Recanati–Cingoli–Treia, Italy
 * Machakos, Kenya
 * Machala, Ecuador
 * Machiques, Venezuela
 * Mackenzie-Fort Smith, Canada
 * Madang, Papua New Guinea
 * Madison, United States
 * Madras and Mylapore, India
 * Madrid, Spain
 * Madurai, India
 * Magangué, Colombia
 * Magdeburg, Germany
 * Mahagi-Nioka, Democratic Republic of the Congo
 * Mahajanga, Madagascar
 * Mahenge, Tanzania
 * Maiduguri, Nigeria
 * Mainz, Germany
 * Maitland-Newcastle, Australia
 * Majorca, Spain
 * Makokou, Apostolic Vicariate, Gabon
 * Makassar, Indonesia
 * Makeni, Sierra Leone
 * Makurdi, Nigeria
 * Malabo, Equatorial Guinea
 * Málaga, Spain
 * Málaga-Soatá, Colombia
 * Malakal, Sudan
 * Malang, Indonesia
 * Malanje, Angola
 * Malaybalay, Philippines
 * Maldonado-Punta del Este, Uruguay
 * Maliana, Timor-Leste
 * Malindi, Kenya
 * Malolos, Philippines
 * Malta, Malta
 * Mamfe, Cameroon
 * Man, Côte d'Ivoire
 * Manado, Indonesia
 * Managua, Nicaragua
 * Mananthavady (Syro-Malabar), India
 * Mananjary, Madagascar
 * Manaus, Brazil
 * Manchester, United States
 * Mandalay, Myanmar
 * Mandeville, Jamaica
 * Mandya (Syro-Malabar), India
 * Manfredonia–Vieste–San Giovanni Rotondo, Italy
 * Manga, Burkina Faso
 * Mangochi, Malawi
 * Mangalore, India
 * Mangochi, Malawi
 * Manila, Philippines
 * Manizales, Colombia
 * Mannar, Sri Lanka
 * Manokwari-Sorong, Indonesia
 * Manono, Democratic Republic of the Congo
 * Mansa, Zambia
 * Mantova, Italy
 * Manzini, Swaziland
 * Mao-Monte Cristi, Dominican Republic
 * Maputo, Mozambique
 * Marabá, Brazil
 * Maracaibo, Venezuela
 * Maracay, Venezuela
 * Mar Addai of Toronto, Chaldean Catholic eparchy, Canada
 * Maradi, Niger
 * Marajó, Territorial Prelature, Brazil
 * Maralal, Kenya
 * Maramureş, Romania
 * Marawi, Territorial Prelature, Philippines
 * Marbel, Philippines
 * Mar del Plata, Argentina
 * Maribor, Slovenia
 * Margarita, Venezuela
 * Mariana, Brazil
 * Mariannhill, South Africa
 * Marília, Brazil
 * Maringá, Brazil
 * Maroua-Mokolo, Cameroon
 * Marquette, United States
 * Marsabit, Kenya
 * Marseille, France
 * Marshall Islands, Apostolic prefecture, Marshall Islands
 * Marthandom (Syro-Malankara), India
 * Mary Most Holy in Astana, Kazakhstan
 * Masaka, Uganda
 * Masan, South Korea
 * Maseru, Lesotho
 * Massa Carrara-Pontremoli, Italy
 * Massa Marittima-Piombino, Italy
 * Masvingo, Zimbabwe
 * Matadi, Democratic Republic of the Congo
 * Matagalpa, Nicaragua
 * Matamoros, Mexico
 * Matanzas, Cuba
 * Matehuala, Mexico
 * Matera-Irsina, Italy
 * Mati, Philippines
 * Maturín, Venezuela
 * Maumere, Indonesia
 * Mavelikara (Syro-Malankara), India
 * Mawlamyine, Myanmar
 * Mayagüez, Puerto Rico
 * Mazara del Vallo, Italy
 * Mazatlán, Mexico
 * Mbaïki, Central African Republic
 * Mbalmayo, Cameroon
 * Mbandaka-Bikoro, Democratic Republic of the Congo
 * Mbanza Congo, Angola
 * Mbarara, Uganda
 * Mbeya, Tanzania
 * Mbinga, Tanzania
 * Mbujimayi, Democratic Republic of the Congo
 * Mbulu, Tanzania
 * Meath, Ireland
 * Meaux, France
 * Mechelen-Brussel, Belgium
 * Medan, Indonesia
 * Medellín, Colombia
 * Meerut, India
 * Meki, Apostolic Vicariate, Ethiopia
 * Melaka-Johor, Malaysia
 * Melbourne, Australia
 * Melbourne, Saints Peter and Paul of, Ukrainian Catholic Eparchy, Australia
 * Melfi-Rapolla-Venosa, Italy
 * Melipilla, Chile
 * Melo, Uruguay
 * Memphis, United States
 * Mende, France
 * Méndez, Apostolic Vicariate, Ecuador
 * Mendi, Papua New Guinea
 * Mendoza, Argentina
 * Menevia, United Kingdom
 * Menongue, Angola
 * Menorca, Spain
 * Merauke, Indonesia
 * Mercedes, Uruguay
 * Mercedes-Luján, Argentina
 * Mérida, Venezuela
 * Mérida-Badajoz, Spain
 * Merlo-Moreno, Argentina
 * Meru, Kenya
 * Messina-Lipari-Santa Lucia del Mela, Italy
 * Metuchen, United States
 * Metz, France
 * Mexicali, Mexico
 * Mexico, Mexico
 * Miami, United States
 * Miao, India
 * Miarinarivo, Madagascar
 * Middlesbrough, United Kingdom
 * Milano, Italy
 * Mileto-Nicotera-Tropea, Italy
 * Milwaukee, United States
 * Minas, Uruguay
 * Mindelo, Cape Verde
 * Minna, Nigeria
 * Minsk–Mohilev, Belarus
 * Minya, Egypt
 * Miracema do Tocantins, Brazil
 * Miri, Malaysia
 * Mississauga (Syro-Malabar eparchy), Canada
 * Mission de France at Pontigny, Territorial Prelature, France
 * Misurata, Apostolic prefecture, Libya
 * Mitú, Apostolic Vicariate, Colombia
 * Mixes, Territorial Prelature, Mexico
 * Mobile, United States
 * Mocoa-Sibundoy, Colombia
 * Modena-Nonantola, Italy
 * Mogadiscio, Somalia
 * Mogi das Cruzes, Brazil
 * Mohale's Hoek, Lesotho
 * Molegbe, Democratic Republic of the Congo
 * Molfetta-Ruvo-Giovinazzo-Terlizzi, Italy
 * Mombasa, Kenya
 * Monaco, Monaco
 * Moncton, Canada
 * Mondoñedo–Ferrol, Spain
 * Mondovì, Italy
 * Mongo, Apostolic Vicariate, Chad
 * Mongomo, Equatorial Guinea
 * Mongu, Zambia
 * Monreale, Italy
 * Monrovia, Liberia
 * Montauban, France
 * Montego Bay, Jamaica
 * Montelíbano, Colombia
 * Montenegro, Brazil
 * Montepulciano-Chiusi-Pienza, Italy
 * Monterey in California, United States
 * Montería, Colombia
 * Monterrey, Mexico
 * Montes Claros, Brazil
 * Montevideo, Uruguay
 * Mont-Laurier, Canada
 * Montpellier, France
 * Montreal, Canada
 * Monze, Zambia
 * Mopti, Mali
 * Moramanga, Madagascar
 * Morelia, Mexico
 * Morogoro, Tanzania
 * Morombe, Madagascar
 * Morón, Argentina
 * Morondava, Madagascar
 * Moroto, Uganda
 * Moshi, Tanzania
 * Mossoró, Brazil
 * Mosul (Chaldean), Iraq
 * Mosul (Syriac), Iraq
 * Mostar–Duvno, Bosnia and Herzegovina
 * Most Holy Trinity in Almaty, Kazakhstan
 * Mother of God at Moscow, Russia
 * Motherwell, United Kingdom
 * Mouila, Gabon
 * Moulins, France
 * Moundou, Chad
 * Mount Hagen, Papua New Guinea
 * Moyobamba, Territorial Prelature, Peru
 * Mpanda, Tanzania
 * Mpika, Zambia
 * Mtwara, Tanzania
 * Mukachevo (Ruthenian), Ukraine
 * Mukachevo (Latin), Ukraine
 * Multan, Pakistan
 * Munich and Freising, Germany
 * Münster, Germany
 * Murang'a, Kenya
 * Murska Sobota, Slovenia
 * Musoma, Tanzania
 * Mutare, Zimbabwe
 * Muvattupuzha (Syro-Malankara eparchy), India
 * Muyinga, Burundi
 * Muzaffarpur, India
 * Mwanza, Tanzania
 * Mweka, Democratic Republic of the Congo
 * Myitkyina, Myanmar
 * Mymensingh, Bangladesh
 * Mysore, India
 * Mỹ Tho, Vietnam
 * Mzuzu, Malawi

N

 * Nacala, Mozambique
 * Nagasaki, Japan
 * Nagoya, Japan
 * Nagpur, India
 * Naha, Japan
 * Nairobi, Kenya
 * Nakhon Ratchasima, Thailand
 * Nakhon Sawan, Thailand
 * Nakuru, Kenya
 * Nalgonda, India
 * Nampula, Mozambique
 * Namur, Belgium
 * Nanchang, China
 * Nancheng, China
 * Nancy, France
 * Nanjing, China
 * Nanlong, China
 * Nanning, China
 * Nanterre, France
 * Nantes, France
 * Nanyang, China
 * Napoli (Naples), Italy
 * Napo, Apostolic Vicariate, Ecuador
 * Nardò – Gallipoli, Italy
 * Nashik, India
 * Nashville, United States
 * Nassau, Bahamas
 * Natal, Brazil
 * Natitingou, Benin
 * Naval, Philippines
 * Naviraí, Brazil
 * Navrongo–Bolgatanga, Ghana
 * Naxos–Andros–Tinos–Mykonos, Greece
 * Nayar, Jesús María del, Territorial Prelature, Mexico
 * Nazaré, Brazil
 * Ndalatando, Angola
 * N'Dali, Benin
 * N'Djamena, Chad
 * Ndola, Zambia
 * Nebbi, Uganda
 * Neiva, Colombia
 * Nekemte, Apostolic Vicariate, Ethiopia
 * Nellore, India
 * Nelson, Canada
 * Nepal, Apostolic Vicariate (in Kathmandu), Nepal
 * Neuquén, Argentina
 * Nevers, France
 * Newark, United States
 * New Orleans, United States
 * New Ulm, United States
 * New Westminster, Canada
 * New Westminster, Ukrainian Catholic Eparchy, Canada
 * New York, United States
 * Neyyattinkara, India
 * Nezahualcóyotl, Mexico
 * Ngaoundéré, Cameroon
 * Ngong, Kenya
 * Ngozi, Burundi
 * Nha Trang, Vietnam
 * Niamey, Niger
 * Nice, France
 * Nicolet, Canada
 * 'Nicopolis, Bulgaria
 * Nicosia, Italy
 * Niigata, Japan
 * Nikopol, Bulgaria
 * Nîmes, France
 * Ningbo, China
 * Ningxia, China
 * Ningyaun, China
 * Niterói, Brazil
 * Nitra, Slovakia
 * Njombe, Tanzania
 * Nkayi, Republic of the Congo
 * Nkongsamba, Cameroon
 * Nnewi, Nigeria
 * Nocera Inferiore-Sarno, Italy
 * Nogales, Mexico
 * Nola, Italy
 * Nongstoin, India
 * Northampton, United Kingdom
 * Northern Arabia, Apostolic Vicariate, in Kuwait City, Kuwait
 * Norwich, United States
 * Nossa Senhora do Líbano em São Paulo, Maronite Eparchy, Brazil
 * Nossa Senhora do Paraíso em São Paulo (Melkite), Brazil
 * Noto, Italy
 * Notre-Dame du Liban de Paris, Maronite Eparchy, France
 * Nottingham, United Kingdom
 * Nouakchott, Mauritania
 * Nouméa, New Caledonia
 * Nouna, Burkina Faso
 * Nova Friburgo, Brazil
 * Nova Iguaçu, Brazil
 * Novaliches, Philippines
 * Novara, Italy
 * Novo Hamburgo, Brazil
 * Novo Mesto, Slovenia
 * Nsukka, Nigeria
 * Nuestra Señora de la Altagracia en Higüey, Dominican Republic
 * Nuestra Señora de los Mártires del Líbano en México (Maronite), Maronite*, Mexico
 * Nuestra Señora del Paraíso en México (Melkite)*, Mexico
 * Nueva Pamplona, Colombia
 * Nueva Segovia, Philippines
 * Nueve de Julio, Argentina
 * Nuevo Casas Grandes, Mexico
 * Nuevo Laredo, Mexico
 * Ñuflo de Chávez, Apostolic Vicariate, Bolivia
 * Nuoro, Italy
 * Nyahururu, Kenya
 * Nyeri, Kenya
 * Nyundo, Rwanda
 * N'Zérékoré, Guinea

O

 * Oakland, United States
 * Obala, Cameroon
 * Oberá, Argentina
 * Óbidos, Brazil
 * Obuasi, Ghana
 * Ocaña, Colombia
 * Odesa, Ukrainian Catholic Archiepiscopal Exarchate, Ukraine 
 * Odesa-Simferopol (Latin), Ukraine
 * Odienné, Côte d'Ivoire
 * Oeiras, Brazil
 * Ogdensburg, United States
 * Ogoja, Nigeria
 * Oita, Japan
 * Okigwe, Nigeria
 * Oklahoma City, United States
 * Olinda e Recife, Brazil
 * Oliveira, Brazil
 * Olomouc, Czech Republic
 * Omaha, United States
 * Ondjiva, Angola
 * Ondo, Nigeria
 * Onitsha, Nigeria
 * Ootacamund, India
 * Opole, Poland
 * Oppido Mamertina-Palmi, Italy
 * Oradea Mare, Romania
 * Oran, Algeria
 * Orán, Argentina
 * Orange, United States
 * Orense, Spain
 * Oria, Italy
 * Orihuela–Alicante, Spain
 * Oristano, Italy
 * Orizaba, Mexico
 * Orlando, United States
 * Orléans, France
 * Orlu, Nigeria
 * Oruro, Bolivia
 * Orvieto-Todi, Italy
 * Osaka, Japan
 * Osasco, Brazil
 * Oslo, Norway
 * Osma-Soria, Spain
 * Osnabrück, Germany
 * Osogbo, Nigeria
 * Osório, Brazil
 * Osorno, Chile
 * Ossory, Ireland
 * Ostia, Italy
 * Ostrava-Opava, Czech Republic
 * Otranto, Italy
 * Ottawa, Canada
 * Otukpo, Nigeria
 * Ouagadougou, Burkina Faso
 * Ouahigouya, Burkina Faso
 * Oudtshoorn, South Africa
 * Ouesso, Republic of the Congo
 * Ourinhos, Brazil
 * Our Lady of Deliverance of Newark, United States
 * Our Lady of Lebanon of Los Angeles, Maronite Eparchy*, United States
 * Our Lady of Nareg in Glendale, Armenian Catholic, United States
 * Oviedo, Spain
 * Owando, Republic of the Congo
 * Owensboro, United States
 * Owerri, Nigeria
 * Oyem, Gabon
 * Oyo, Nigeria
 * Ozamiz, Philippines
 * Ozieri, Italy

P

 * Padang, Indonesia
 * Paderborn, Germany
 * Padova, Italy
 * Pagadian, Philippines
 * Paisley, United Kingdom
 * Pakse (Paksé), Apostolic Vicariate, Laos
 * Pala, Chad
 * Palai, India
 * Palangkaraya, Indonesia
 * Palayamkottai, India
 * Palembang, Indonesia
 * Palencia, Spain
 * Palermo, Italy
 * Palestrina, Italy
 * Palghat, Syro-Malabar Eparchy, India
 * Palmares, Brazil
 * Palmas, Brazil
 * Palmas–Francisco Beltrão, Brazil
 * Palm Beach, United States
 * Palmeira dos Índios, Brazil
 * Palmerston North, New Zealand
 * Palmira, Colombia
 * Palo, Philippines
 * Pamiers, France
 * Pamplona y Tudela, Spain
 * Panamá, Panama
 * Pando, Apostolic Vicariate, Bolivia
 * Panevėžys, Lithuania
 * Pankshin, Nigeria
 * Pannonhalma, Territorial Abbacy, Hungary
 * Paoking (Baoqing, Shaoyang), Apostolic prefecture, China PR
 * Papantla, Mexico
 * Papeete, French Polynesia (& Pitcairn Islands)
 * Paracatu, Brazil
 * Paraíba, Brazil
 * Parakou, Benin
 * Paramaribo, Suriname
 * Paraná, Argentina
 * Paranaguá, Brazil
 * Parañaque, Philippines
 * Paranavaí, Brazil
 * Parassala, Syro-Malankara Catholic Eparchy, India
 * Parintins, Brazil
 * Paris, France
 * Parma, Italy
 * Parma (Ruthenian), United States
 * Parma (Ukrainian), United States
 * Parnaíba, Brazil
 * Parral, Mexico
 * Parramatta, Australia
 * Pasig, Philippines
 * Passaic (Ruthenian)*, Eparchy United States
 * Passau, Germany
 * Passo Fundo, Brazil
 * Pasto, Colombia
 * Paterson, United States
 * Pathanamthitta, Syro-Malankara Catholic Eparchy, India
 * Pathein, Myanmar
 * Patna, India
 * Patos, Brazil
 * Patos de Minas, Brazil
 * Patti, Italy
 * Paulo Afonso, Brazil
 * Pavia, Italy
 * Pécs, Hungary
 * Pekhon, Myanmar
 * Pelotas, Brazil
 * Pelplin, Poland
 * Pemba, Mozambique
 * Pembroke, Canada
 * Penang, Malaysia
 * Penedo, Brazil
 * Penonomé, Panama
 * Pensacola-Tallahassee, United States
 * Peoria, United States
 * Pereira, Colombia
 * Périgueux, France
 * Perpignan-Elne, France
 * Perth, Australia
 * Perugia–Città della Pieve, Italy
 * Pesaro, Italy
 * Pescara-Penne, Italy
 * Pescia, Italy
 * Pesqueira, Brazil
 * Petare, Venezuela
 * Peterborough, Canada
 * Petra and Philadelphia, Melkite*, Jordan
 * Petrolina, Brazil
 * Petrópolis, Brazil
 * Phan Thiết, Vietnam
 * Phát Diêm, Vietnam
 * Philadelphia (Latin Church), United States
 * Philadelphia (Ukrainian Catholic), United States
 * Phnom Penh, Apostolic Vicariate, Cambodia
 * Phoenix (Latin Church), United States
 * Phoenix (Ruthenian*), United States
 * Phú Cường, Vietnam
 * Piacenza-Bobbio, Italy
 * Piana degli Albanesi, Italo-Albanese Eparchy, Italy
 * Piazza Armerina, Italy
 * Picos, Brazil
 * Piedras Negras, Mexico
 * Pietersburg, South Africa
 * Pilcomayo, Apostolic Vicariate, Paraguay
 * Pinar del Río, Cuba
 * Pinerolo, Italy
 * Pingliang, Cuba
 * Pinheiro, Brazil
 * Pinsk, Belarus
 * Piracicaba, Brazil
 * Pisa, Italy
 * Pistoia, Italy
 * Pitigliano-Sovana-Orbetello, Italy
 * Pittsburgh (Latin Church), United States
 * Pittsburgh (Ruthenian Catholic Byzantine), United States
 * Piura, Peru
 * Plasencia, Spain
 * Płock, Poland
 * Plymouth, United Kingdom
 * Plzeň, Czech Republic
 * Plymouth, United States
 * Pointe-à-Pitre: see united see Basse-Terre(-Pointe-à-Pitre)
 * Pointe-Noire, Republic of the Congo
 * Poitiers, France
 * Pompei aka Beatissima Vergine Maria del SS.mo Rosario (Blessed Virgin of the Most Sacred Rosary), Territorial Prelature, Brazil
 * Ponce, Puerto Rico
 * Pondicherry and Cuddalore, India
 * Ponta de Pedras, Brazil
 * Ponta Grossa, Brazil
 * Pontianak, Indonesia
 * Pontigny (Mission de France), Territorial Prelature, France
 * Pontoise, France
 * Poona, India
 * Popayán, Colombia
 * Popokabaka, Democratic Republic of the Congo
 * Poreč i Pula, Croatia
 * Portalegre–Castelo Branco, Portugal
 * Port-au-Prince, Haiti
 * Port-Bergé, Madagascar
 * Port Blair, India
 * Port-de-Paix, Haiti
 * Port Elizabeth, South Africa
 * Port-Gentil, Gabon
 * Port Hartcourt, Nigeria
 * Portland in Oregon, United States
 * Portland in Maine, United States
 * Port-Louis, Mauritius
 * Port Moresby, Papua New Guinea
 * Porto, Portugal
 * Porto Alegre, Brazil
 * Port of Spain, Trinidad and Tobago
 * Porto Nacional, Brazil
 * Porto Novo, Benin
 * Porto-Santa Rufina, Italy
 * Porto Velho, Brazil
 * Portoviejo, Ecuador
 * Port Pirie, Australia
 * Portsmouth, United Kingdom
 * Port Victoria, Seychelles
 * Port-Vila, Vanuatu
 * Posadas, Argentina
 * Potenza-Muro Lucano-Marsico Nuovo, Italy
 * Potosí, Bolivia
 * Pouso Alegre, Brazil
 * Požega, Croatia
 * Poznań, Poland
 * Pozzuoli, Italy
 * Prague (Praha), Czech Republic
 * Prato, Italy
 * Presidente Prudente, Brazil
 * Prešov, Slovak Catholic Archeparchy, Metropolitanate sui juris, Slovakia
 * Pretoria, South Africa
 * Prince-Albert, Canada
 * Prince George, Canada
 * Prizren-Priština, Kosovo
 * Propriá, Brazil
 * Providence, United States
 * Prudentópolis, Imaculada Conceição in -, Ukrainian Catholic Eparchy, Brazil
 * Przemyśl, Poland
 * Przemyśl-Warszawa (Ukrainian Catholic), Poland
 * Pucallpa, Apostolic Vicariate, Peru
 * Puebla de los Angeles, Mexico
 * Pueblo, United States
 * Puerto Cabello, Venezuela
 * Puerto Escondido, Mexico
 * Puerto Iguazú, Argentina
 * Puerto Ayacucho, Apostolic Vicariate, Veneuzuela
 * Puerto Carreño, Apostolic Vicariate, Colombia
 * Puerto Gaitán, Apostolic Vicariate, Colombia
 * Leguízamo–Solano, Apostolic Vicariate, Colombia
 * Puerto Maldonado, Apostolic Vicariate, Peru
 * Puerto Montt, Chile
 * Puerto Plata, Dominican Republic
 * Puerto Princesa, Apostolic Vicariate, Philippines
 * Punalur, India
 * Puno, Peru
 * Punta Arenas, Chile
 * Puntarenas, Costa Rica
 * Punto Fijo, Venezuela
 * Puqi, China
 * Purnea, India
 * Purwokerto, Indonesia
 * Pusan (Busan), South Korea
 * Puthur, Syro-Malankara Catholic Eparchy, India
 * Puyo, Apostolic Vicariate, Ecuador
 * Pyay, Myanmar
 * Pyongyang (P'yŏng-yang), North Korea

Q

 * Qacha's Nek, Lesotho
 * Qizhou, China
 * Qingdao, China
 * Quebec, Canada
 * Queenstown, South Africa
 * Quelimane, Mozambique
 * Querétaro, Mexico
 * Quetta, Apostolic Vicariate, Pakistan
 * Quibdó, Colombia
 * Quiché, Guatemala
 * Quilmes, Argentina
 * Quilon, India
 * Quimper-Léon, France
 * Quito, Ecuador
 * Quixadá, Brazil
 * Quy Nhơn, Vietnam

R

 * Rabat, Morocco
 * Rabaul, Papua New Guinea
 * Radom, Poland
 * Rafaela, Argentina
 * Ragusa, Italy
 * Raiganj, India
 * Raigarh, India
 * Raipur, India
 * Rajkot, India
 * Rajshahi, Bangladesh
 * Raleigh, United States
 * Ramanathapuram, India
 * Rancagua, Chile
 * Ranchi, India
 * Rangoon (Yangon), Burma
 * Raphoe, Ireland
 * Rapid City, United States
 * Rarotonga, Cook Islands
 * Ratchaburi, Thailand
 * Ratnapura, Sri Lanka
 * Ravenna-Cervia, Italy
 * Rawson, Argentina
 * Rayagada, India
 * Reconquista, Argentina
 * Regensburg, Germany
 * Reggio Calabria-Bova, Italy
 * Reggio Emilia-Guastalla, Italy
 * Regina, Canada
 * Registro, Brazil
 * Rehe, China
 * Reims, France
 * Rennes, France
 * Reno, United States
 * Resistencia, Argentina
 * Requena, Apostolic Vicariate, Peru
 * Reyes, Apostolic Vicariate, Bolivia
 * Reykjavík, Iceland
 * Rēzekne–Aglona, Latvia
 * Rhodos, Greece
 * Ribeirão Preto, Brazil
 * Richmond, United States
 * Rieti, Italy
 * Riga, Latvia
 * Rijeka, Croatia
 * Rimini, Italy
 * Rimouski, Canada
 * Riobamba, Ecuador
 * Rio Branco, Brazil
 * Rio do Sul, Brazil
 * Río Gallegos, Argentina
 * Rio Grande, Brazil
 * Riohacha, Colombia
 * Robe, Apostolic prefecture, Ethiopia
 * Rochester, United States
 * Rockford, United States
 * Rockhampton, Australia
 * Rockville Centre, United States
 * Rodez, France
 * Rodrigues, Apostolic Vicariate, Mauritius
 * Roermond, Netherlands
 * Romblon, Philippines
 * Rome, Italy
 * Rondonópolis, Brazil
 * Roraima, Brazil
 * Rosario, Argentina
 * Roseau, Dominica
 * Rossano-Cariati, Italy
 * Rottenburg-Stuttgart, Germany
 * Rotterdam, Netherlands
 * Rouen, France
 * Rourkela, India
 * Rouyn-Noranda, Canada
 * Rožňava, Slovakia
 * Rrëshen, Albania
 * Rubiataba–Mozarlândia, Brazil
 * Ruhengeri, Rwanda
 * Rulenge, Tanzania
 * Rumbek, Sudan
 * Rundu, Apostolic Vicariate, Namibia
 * Rustenburg, South Africa
 * Rutana, Burundi
 * Ruteng, Indonesia
 * Ruy Barbosa, Brazil
 * Ruyigi, Burundi
 * Rzeszów, Poland

S

 * Sabina-Poggio Mirteto, Italy
 * Sacramento, United States
 * Sagar, India
 * Saginaw, United States
 * Saida (Maronite), Lebanon
 * Saida, Lebanon
 * St Andrews and Edinburgh, United Kingdom
 * St. Augustine, United States
 * Saint Boniface, Canada
 * Saint-Brieuc, France
 * Saint Catharines, Canada
 * Saint-Claude, France
 * Saint Clement at Saratov, Russia
 * Saint Cloud, United States
 * Saint-Denis, France
 * Saint-Denis-de-La Réunion, Réunion (French)
 * Saint-Dié, France
 * Sainte-Anne-de-la-Pocatière, Canada
 * Sainte-Croix-de-Paris, Armenian Catholic Apostolic Eparchy, France, exempt
 * Saint Ephrem of Khadki (Syro-Malankara), Exachate, India
 * Saint-Étienne, France
 * Saint-Flour, France
 * Saint George in Canton, Romanian Catholic Eparchy, United States
 * Saint George's in Grenada, Grenada
 * Saint Helena, Ascension Island and Tristan da Cunha, Mission sui juris, Saint Helena, Ascension Island and Tristan da Cunha (UK)
 * Saint-Hyacinthe, Canada
 * Saint-Jean-Longueuil, Canada
 * Saint-Jérôme, Canada
 * Saint John Chrysostom of Gurgaon, Syro-Malankara Catholic Eparchy, India
 * Saint John, New Brunswick, Canada
 * Saint John's–Bassetere, the Caribbean
 * St. John's, Newfoundland, Canada
 * Saint Joseph at Irkutsk, Russia
 * St. Louis, United States
 * Saint-Louis du Sénégal, Senegal
 * Saint-Maron de Montréal, Maronite Eparchy, Canada
 * Saint Maron of Brooklyn, Maronite Eparchy, United States
 * Saint Maron of Sydney, Maronite Eparchy, Australia
 * Saint Michael's of Sydney, Melkite Greek*, Australia
 * Saint Nicholas of Chicago, Ukrainian Catholic Eparchy, United States
 * Saint Nicholas of Ruski Krstur, Greek Catholic Eparchy, Serbia
 * Saint Paul, Alberta, Canada
 * Saint Paul and Minneapolis, United States
 * Saint Peter the Apostle of El Cajon, Chaldean Catholic Eparchy, United States
 * Saint Petersburg, United States
 * Saint-Sauveur de Montréal, Melkite Greek Catholic*, Canada
 * Saints Cyril and Methodius of Toronto, Slovak Greek Catholic Eparchy, Canada
 * Saints Peter and Paul of Melbourne, Ukrainian Catholic Eparchy, Australia
 * Saint Thomas, at Charlotte Amalie, U.S. Virgin Islands
 * Saint Thomas the Apostle of Chicago, Syro-Malabar Catholic Eparchy, United States
 * Saint Thomas the Apostle of Detroit, Chaldean Catholic* Eparchy, United States
 * Saint Thomas the Apostle of Sydney, Chaldean Catholic Eparchy, Australia
 * Saitama, Japan
 * Sakania–Kipushi, Democratic Republic of the Congo
 * Salamanca, Spain
 * Sale, Australia
 * Salem, India
 * Salerno-Campagna-Acerno, Italy
 * Salford, United Kingdom
 * Salgueiro, Brazil
 * Salina, United States
 * Salmas, Chaldean Catholic Archeparchy (Archdiocese), Iran
 * Salta, Argentina
 * Saltillo, Mexico
 * Salt Lake City, United States
 * Salto, Uruguay
 * Saluzzo, Italy
 * Salzburg, Austria
 * Samarinda, Indonesia
 * Sambalpur, India
 * Sambir-Drohobych, Ukrainian Catholic Eparchy, Ukraine
 * Same, Tanzania
 * Samoa-Apia, Samoa
 * Samoa-Pago Pago, American Samoa
 * San, Mali
 * San Andrés y Providencia, Apostolic Vicariate, Colombia
 * San Andrés Tuxtla, Mexico
 * San Angelo, United States
 * San Antonio, United States
 * San Benedetto del Tronto-Ripatransone-Montalto, Italy
 * San Bernardino, United States
 * San Bernardo, Chile
 * San Carlos, Philippines
 * San Carlos de Ancud, Chile
 * San Carlos de Bariloche, Argentina
 * San Carlos de Venezuela, Venezuela
 * San Charbel en Buenos Aires*, Eparchy, Argentina
 * (San Cristóbal de) la Habana, Cuba
 * San Cristóbal de La Laguna, Spain
 * San Cristóbal de las Casas, Mexico
 * San Cristóbal de Venezuela, Venezuela
 * Sandakan, Malaysia
 * Sandhurst, Australia
 * Santo Domingo, Ecuador
 * San Diego, United States
 * Sandomierz, Poland
 * Santo Domingo, Ecuador
 * San Felipe, Chile
 * San Felipe, Venezuela
 * San Fernando, Philippines
 * San Fernando de Apure, Venezuela
 * San Fernando de La Union, Philippines
 * San Francisco, Argentina
 * San Francisco, United States
 * San Francisco de Macorís, Dominican Republic
 * San Francisco Javier (Jaén en Perú), Apostolic Vicariate, Peru
 * San Francisco de Asís de Jutiapa, Guatemala
 * Sanggau, Indonesia
 * Sangmélima, Cameroon
 * San Gregorio de Narek en Buenos Aires, Armenian Catholic*, Argentina
 * San Ignacio de Velasco, Bolivia
 * San Isidro, Argentina
 * San Isidro de El General, Costa Rica
 * San Jacinto, Ecuador
 * San José de Amazonas, Apostolic Vicariate, Peru
 * San Jose in Mindoro, Apostolic Vicariate, Philippines
 * San Jose in Nueva Ecija, Philippines
 * San Jose de Antique, Philippines
 * San José de Costa Rica, Costa Rica
 * San José del Guaviare, Colombia
 * San José de Mayo, Uruguay
 * San Jose in California, United States
 * San Juan Bautista de Las Misiones, Paraguay
 * San Juan de Cuyo, Argentina
 * San Juan de La Maguana, Dominican Republic
 * San Juan de los Lagos, Mexico
 * San Juan de Puerto Rico, Puerto Rico
 * San Justo, Argentina
 * Sankt Gallen, Switzerland
 * Sankt Pölten, Austria
 * San Lorenzo, Paraguay
 * San Luis, Argentina
 * San Luis Potosí, Mexico
 * San Marco Argentano–Scalea, Italy
 * San Marcos, Guatemala
 * San Marino–Montefeltro, San Marino & Italy
 * San Martín, Argentina
 * San Miguel, El Salvador
 * San Miguel, Argentina
 * San Miguel de Sucumbíos, Apostolic Vicariate, Ecuador
 * San Miniato, Italy
 * San Nicolás de los Arroyos, Argentina
 * San Pablo, Philippines
 * San Pedro, Paraguay
 * San Pedro de Macorís, Dominican Republic
 * San Pedro-en-Côte d'Ivoire, Côte d'Ivoire
 * San Pedro Sula, Honduras
 * San Rafael, Argentina
 * San Ramón, Apostolic Vicariate, Peru
 * San Roque de Presidencia Roque Sáenz Peña, Argentina
 * San Salvador, El Salvador
 * San Sebastián, Spain
 * San Severo, Italy
 * Santa Ana, El Salvador
 * Santa Clara, Cuba
 * Santa Cruz de la Sierra, Bolivia
 * Santa Cruz do Sul, Brazil
 * Santa Elena, Ecuador
 * Santa Fe, United States
 * Santa Fe de Antioquia, Colombia
 * Santa Fe de la Vera Cruz, Argentina
 * Santa Maria, Brazil
 * Santa Maria di Grottaferrata, Italo-Albanese Territorial Abbacy, Italy
 * Santa María de Los Ángeles, Chile
 * Santa María del Patrocinio en Buenos Aires, Ukrainian Catholic Eparchy, in Buenos Aires, Argentina
 * Santa Marta, Colombia
 * Santander, Spain
 * Sant'Angelo dei Lombardi–Conza–Nusco–Bisaccia, Italy
 * Santarém, Portugal
 * Santarém, Brazil
 * Santa Rosa, Argentina
 * Santa Rosa, United States
 * Santa Rosa de Copán, Honduras
 * Santa Rosa de Lima, Guatemala
 * Santa Rosa de Osos, Colombia
 * Sant Feliu de Llobregat, Spain
 * Santiago Apóstol de Huancané, Territorial Prelature, Peru
 * Santiago de Cabo Verde, Cape Verde
 * Santiago de Chile, Chile
 * Santiago de Compostela, Spain
 * Santiago de Cuba, Cuba
 * Santiago del Estero, Argentina
 * Santiago de los Caballeros, Dominican Republic
 * Santiago de María, El Salvador
 * Santiago de Veraguas, Panama
 * Santísimo Salvador de Bayamo y Manzanillo, Cuba
 * Santíssima Conceição do Araguaia, Brazil
 * Santo Amaro, Brazil
 * Santo André, Brazil
 * Santo Ângelo, Brazil
 * Santo Cristo de Esquipulas, Territorial Prelature, Guatemala
 * Santo Domingo, Dominican Republic
 * Santo Domingo de los Colorados, Ecuador
 * Santorini, Greece
 * Santos, Brazil
 * Santo Tomé, Argentina
 * San Vicente, El Salvador
 * San Vicente del Caguán, Colombia
 * Sanyuan, China
 * São Carlos, Brazil
 * São Félix (do Araguaia), Territorial Prelature, Brazil
 * São Gabriel da Cachoeira, Brazil
 * São João Batista em(=in) Curitiba (Ukrainian), Ukrainian Catholic Archeparchy, Brazil
 * São João Batista em Curitiba (Latin), Brazil
 * São João da Boa Vista, Brazil
 * São João del Rei, Brazil
 * São José do Rio Preto, Brazil
 * São José dos Campos, Brazil
 * São José dos Pinhais, Brazil
 * São Luís de Cáceres, Brazil
 * São Luís de Montes Belos, Brazil
 * São Luís do Maranhão, Brazil
 * São Mateus, Brazil
 * São Miguel Paulista, Brazil
 * São Paulo, Brazil
 * São Raimundo Nonato, Brazil
 * São Salvador da Bahia, Brazil
 * São Sebastião do Rio de Janeiro, Brazil
 * São Tomé and Príncipe, São Tomé and Príncipe
 * Sapë, Albania
 * Sapporo, Japan
 * Sarh, Chad
 * Saskatoon, Canada
 * Saskatoon, Ukrainian Catholic Eparchy, Canada
 * Sassari, Italy
 * Satna, India
 * Satu Mare, Romania
 * Sault Sainte Marie, Canada
 * Saurímo, Angola
 * Savannah, United States
 * Savannakhet, Apostolic Vicariate, Cambodia
 * Savona-Noli, Italy
 * Scranton, United States
 * Seattle, United States
 * Sées, France
 * Segheneyti, Eritrean Catholic Eparchy, Eritrea
 * Segorbe–Castellón de la Plana, Spain
 * Ségou, Mali
 * Segovia, Spain
 * Sekondi–Takoradi, Ghana
 * Semarang, Indonesia
 * Sendai, Japan
 * Senigallia, Italy
 * Sens, France
 * Seoul, South Korea
 * Serrinha, Brazil
 * Sessa Aurunca, Italy
 * Sete Lagoas, Brazil
 * Setúbal, Portugal
 * Sevilla, Spain
 * Shamshabad, Syro-Malabar Catholic Eparchy, India
 * Shanghai, China
 * Shantou, China
 * Shaoyang (Baoqing, Paoking), Apostolic prefecture, China PR
 * Shaozhou, China
 * Shendam, Nigeria
 * Shenyang, China
 * Sherbrooke, Canada
 * 's-Hertogenbosch, Netherlands
 * Shillong, India
 * Shimoga, India
 * Shinan, China
 * Shinyanga, Tanzania
 * Shkodër–Pult, Albania
 * Shreveport, United States
 * Shrewsbury, United Kingdom
 * Shunde, China
 * Shunqing, China
 * Shuozhou, China
 * Šiauliai, Lithuania
 * Šibenik, Croatia
 * Sibolga, Indonesia
 * Sibu, Malaysia
 * Sicuani, Peru
 * Siedlce, Poland
 * Siena–Colle di Val d'Elsa–Montalcino, Italy
 * Sigüenza–Guadalajara, Spain
 * Sikasso, Mali
 * Simdega, India
 * Simferopol (Crimea, Krym), Ukrainian Catholic Archiepiscopal Exarchate, Ukraine
 * Simla and Chandigarh, India
 * Sincelejo, Colombia
 * Sindhudurg, India
 * Singapore, Singapore
 * Singida, Tanzania
 * Sinop, Brazil
 * Sintang, Indonesia
 * Sion, Switzerland
 * Sioux City, United States
 * Sioux Falls, United States
 * Sipingjie, China
 * Siracusa, Italy
 * Sisak, Croatia
 * Siuna, Nicaragua
 * Sivagangai, India
 * Skopje, Macedonia
 * Soacha, Colombia
 * Sobral, Brazil
 * Socorro y San Gil, Colombia
 * Soddo, Apostolic Vicariate, Ethiopia
 * Sofia-Plovdiv, Bulgaria
 * Sohag, Coptic Catholic Eparchy, Egypt
 * Soissons, France
 * Sokal-Zhovkva, Ukrainian Catholic Eparchy, Ukraine
 * Sokodé, Togo
 * Sokoto, Nigeria
 * Sololá–Chimaltenango, Guatemala
 * Solsona, Spain
 * Solwezi, Zambia
 * Songea, Tanzania
 * Sonsonate, El Salvador
 * Sonsón–Rionegro, Colombia
 * Sora-Aquino-Pontecorvo, Italy
 * Sorocaba, Brazil
 * Soroti, Uganda
 * Sorrento-Castellammare di Stabia, Italy
 * Sorsogon, Philippines
 * Sosnowiec, Poland
 * Southern Arabia, Apostolic Vicariate, in Abu Dhabi, UAE
 * Southwark, United Kingdom
 * Speyer, Germany
 * Spiš, Slovakia
 * Split–Makarska, Croatia
 * Spokane, United States
 * Spoleto-Norcia, Italy
 * Springfield in Illinois, United States
 * Springfield in Massachusetts, United States
 * Springfield-Cape Girardeau, United States
 * Srijem, Serbia
 * Srikakulam, India
 * Stamford, Ukrainian Catholic Eparchy, United States
 * Steubenville, United States
 * Stockholm, Sweden
 * Stockton, United States
 * Strasbourg, France
 * Stryi, Ukrainian Catholic Eparchy, Ukraine
 * Subotica, Serbia
 * Suchitepéquez–Retalhuleu, Guatemala
 * Sucre, Bolivia
 * Suifu, China
 * Suiyuan, China
 * Sulaimaniya, Chaldean Catholic – see Kirkuk-Sulaimaniya, Iraq
 * Sulmona-Valva, Italy
 * Sultanpet, India
 * Sumbawanga, Tanzania
 * Sumbe, Angola
 * Sunyani, Ghana
 * Superior, United States
 * Surabaya, Indonesia
 * Surat Thani, Thailand
 * Surigao, Philippines
 * Susa, Italy
 * Suva, Fiji
 * Suwon, South Korea
 * Suzhou, China
 * Świdnica, Poland
 * Sydney (Roman Catholic), Australia
 * Sydney, Saint Thomas the Apostle of -, Chaldean Catholic Eparchy, Australia
 * Sydney, Saint Maron of -, Maronite Eparchy, Australia
 * Sydney, Saint Michael's of, Melkite Greek Eparchy, Australia
 * Sylhet, Bangladesh
 * Syracuse, United States
 * Syros–Milos, Greece
 * Szczecin–Kamień, Poland
 * Szeged-Csanád, Hungary
 * Székesfehérvár, Hungary
 * Szombathely, Hungary
 * Szombathely, Hungary

T

 * Tabasco, Mexico
 * Tabora, Tanzania
 * Tabuk, Apostolic Vicariate, Philippines
 * Tacámbaro, Mexico
 * Tacna y Moquegua, Peru
 * Tacuarembó, Uruguay
 * Taegu (Daegu), South Korea
 * Taejŏn: see Daejeon
 * Tagbilaran, Philippines
 * Tagum, Philippines
 * Taichung, Taiwan
 * Tainan, Taiwan
 * Taiohae o Tefenuaenata, French Polynesia
 * Taipei, Taiwan
 * Taiyuan, China PR
 * Taizhou, China PR
 * Takamatsu, Japan
 * Talca, Chile
 * Talibon, Philippines
 * Tamale, Ghana
 * Tambacounda, Senegal
 * Tampico, Mexico
 * Tandag, Philippines
 * Tanga, Tanzania
 * Tanger, Morocco
 * Tanjore, India
 * Tanjungkarang, Indonesia
 * Tanjung Selor, Indonesia
 * Tapachula, Mexico
 * Tarahumara, Mexico
 * Taranto, Italy
 * Tarawa and Nauru, Kiribati & Nauru
 * Tarazona, Spain
 * Tarbes-et-Lourdes, France
 * Tarija, Bolivia
 * Tarlac, Philippines
 * Tarma, Peru
 * Tarnów, Poland
 * Tarragona, Spain
 * Taubaté, Brazil
 * Taunggyi, Myanmar
 * Taungngu, Myanmar
 * Taytay, Apostolic Vicariate, Philippines
 * Teano-Calvi, Italy
 * Techiman, Ghana
 * Tefé, Territorial Prelature, Brazil
 * Teggiano-Policastro, Italy
 * Tegucigalpa, Honduras
 * Teheran-Isfahan, Iran
 * Tehran, Chaldean Catholic Metropolitan, Iran
 * Tehuacán, Mexico
 * Tehuantepec, Mexico
 * Teixeira de Freitas-Caravelas, Brazil
 * Tellicherry, India
 * Telšiai, Lithuania
 * Timişoara, Romania
 * Tempio-Ampurias, Italy
 * Temuco, Chile
 * Tenancingo, Mexico
 * Teotihuacan, Mexico
 * Teófilo Otoni, Brazil
 * Tepic, Mexico
 * Teramo-Atri, Italy
 * Teresina, Brazil
 * Termoli-Larino, Italy
 * Terni-Narni-Amelia, Italy
 * Ternopil – Zboriv, Ukrainian Catholic Archeparchy, Ukraine
 * Terrassa, Spain
 * Teruel y Albarracín, Spain
 * Tete, Mozambique
 * Texcoco, Mexico
 * Tezpur, India
 * Thái Bình, Vietnam
 * Thamarasserry, Syro-Malabar Eparchy, India
 * Thanh Hóa, Vietnam
 * Thare and Nonseng, Thailand
 * Thessaloniki, Apostolic Vicariate, Greece
 * Thiès, Senegal
 * Thuckalay, India
 * Thunder Bay, Canada
 * Tianguá, Brazil
 * Tianjin, China PR
 * Tibú, Colombia
 * Tierradentro, Apostolic Vicariate, Colombia
 * Tijuana, Mexico
 * Tilarán, Costa Rica
 * Timika, Indonesia
 * Timişoara, Romania
 * Timmins, Canada
 * Tingzhou, China PR
 * Tiranë–Durrës, Albania
 * Tiruchirapalli, India
 * Tiruvalla, Syro-Malankara Catholic Archeparchy, India
 * Tivoli, Italy
 * Tlalnepantla, Mexico
 * Tlapa, Mexico
 * Tlaxcala, Mexico
 * Toamasina, Madagascar
 * Tocantinópolis, Brazil
 * Tokyo, Japan
 * Tôlagnaro, Madagascar
 * Toledo, Spain
 * Toledo, United States
 * Toledo, Brazil
 * Toliara, Madagascar
 * Toluca, Mexico
 * Tombura-Yambio, Sudan
 * Tonga, Tonga & Niue
 * Toowoomba, Australia
 * Torino, Italy
 * Torit, Sudan
 * Toronto, Canada
 * Toronto, Mar Addai of, Chaldean Catholic Eparchy, Canada
 * Toronto, Saints Cyril and Methodius of, Slovak Catholic Eparchy, Canada
 * Toronto and Eastern Canada, Ukrainian Catholic Eparchy, Canada
 * Tororo, Uganda
 * Torreón, Mexico
 * Tortona, Italy
 * Tortosa, Spain
 * Toruń, Poland
 * Toulouse, France
 * Tournai, Belgium
 * Tours, France
 * Townsville, Australia
 * Tranti-Barletta-Bisceglie, Italy
 * Transfiguration at Novosibirsk, Russia
 * Trapani, Italy
 * Trento, Italy
 * Trenton, United States
 * Três Lagoas, Brazil
 * Treviso, Italy
 * Tricarico, Italy
 * Trichur, Syro-Malabar Catholic Archeparchy, India
 * Trier, Germany
 * Trieste, Italy
 * Trincomalee, Sri Lanka
 * Trinidad, Apostolic Vicariate, Colombia
 * Tripoli, Maronite Eparchy, Lebanon
 * Tripoli (Lebanon), Melkite*, Lebanon
 * Tripoli (Libya), Apostolic Vicariate, Libya
 * Trivandrum, Syro-Malankara Catholic Metropolitan Archeparchy and Major Archdiocesis, India
 * Trivento, Italy
 * Trnava, Slovakia
 * Trois-Rivières, Canada
 * Tromsø, Territorial Prelature, Norway
 * Trondheim, Territorial Prelature, Norway
 * Troyes, France
 * Trujillo, Peru
 * Trujillo, Honduras
 * Trujillo, Venezuela
 * Tshumbe, Democratic Republic of the Congo
 * Tsiroanomandidy, Madagascar
 * Tuam, Ireland
 * Tubarão, Brazil
 * Tucson, United States
 * Tucumán, Argentina
 * Tucupita, Apostolic Vicariate, Venezuela
 * Tuguegarao, Philippines
 * Tui-Vigo, Spain
 * Tula, Mexico
 * Tulancingo, Mexico
 * Tulcán, Ecuador
 * Tulle, France
 * Tulsa, United States
 * Tumaco, Colombia
 * Tunduru–Masasi, Tanzania
 * Tunis, Tunisia
 * Tunja, Colombia
 * Tura, India
 * Tursi-Lagonegro, Italy
 * Tuticorin, India
 * Tuxpan, Mexico
 * Tuxtepec, Mexico
 * Tuxtla Gutiérrez, Mexico
 * Tyler, United States
 * Tyre, Melkite Metropolitan Archeparchy, Lebanon
 * Tyre, Maronite Archeparchy, Lebanon
 * Tzaneen, South Africa

U

 * Uberaba, Brazil
 * Uberlândia, Brazil
 * Ubon Ratchathani, Thailand
 * Udaipur, India
 * Udine, Italy
 * Udon Thani, Thailand
 * Udupi, India
 * Ugento-Santa Maria de Leuca, Italy
 * Uíje, Angola
 * Uijeongbu (Uijongbu), South Korea
 * Ujjain, India
 * Ulaanbaatar (Ulan Bator), Apostolic prefecture, (Outer) Mongolia
 * Umtata, South Africa
 * Umuahia, Nigeria
 * Umuarama, Brazil
 * Umzimkulu, South Africa
 * União da Vitória, Brazil
 * Urbino–Urbania–Sant'Angelo in Vado, Italy
 * Urdaneta, Philippines
 * Urgell, Spain & Andorra
 * Urmya, Iran
 * Uromi, Nigeria
 * Uruaçu, Brazil
 * Uruguaiana, Brazil
 * Utrecht, Netherlands
 * Uvira, Democratic Republic of the Congo
 * Uyo, Nigeria

V

 * Vác, Hungary
 * Vacaria, Brazil
 * Vaduz, Liechtenstein
 * Valdivia, Chile
 * Valença, Brazil
 * Valence, France
 * Valencia, Spain
 * Valencia, Venezuela
 * Valladolid, Spain
 * Valle de Chalco, Mexico
 * Valle de la Pascua, Venezuela
 * Valledupar, Colombia
 * Valleyfield, Canada
 * Vallo della Lucania, Italy
 * Valparaíso, Chile
 * Vancouver, Canada
 * Vanimo, Papua New Guinea
 * Vannes, France
 * Varanasi, India
 * Varaždin, Croatia
 * Vasai, India
 * Vélez, Colombia
 * Velletri-Segni, Italy
 * Vellore, India
 * Venado Tuerto, Argentina
 * Venezia, Italy
 * Venice in Florida, United States
 * Ventimiglia-San Remo, Italy
 * Veracruz, Mexico
 * Roman Catholic Diocese of Verapaz, Cobán, Guatemala
 * Verapoly, India
 * Vercelli, Italy
 * Verdun, France
 * Verona, Italy
 * Versailles, France
 * Veszprém, Hungary
 * Viana, Brazil
 * Viana, Angola
 * Viana do Castelo, Portugal
 * Vic, Spain
 * Vicenza, Italy
 * Victoria, Canada
 * Victoria in Texas, United States
 * Viedma, Argentina
 * Vientiane, Apostolic Vicariate, Laos
 * Vigevano, Italy
 * Vijayapuram, India
 * Vijayawada, India
 * Vila Real, Portugal
 * Vilkaviškis, Lithuania
 * Villa de la Concepción del Río Cuarto, Argentina
 * Villa María, Argentina
 * Villarrica, Chile
 * Villarrica del Espíritu Santo, Paraguay
 * Villavicencio, Colombia
 * Vilnius, Lithuania
 * Vinh, Vietnam
 * Vĩnh Long, Vietnam
 * Virac, Philippines
 * Visakhapatnam, India
 * Viseu, Portugal
 * Vitebsk, Belarus
 * Viterbo, Italy
 * Vitória, Brazil
 * Vitória da Conquista, Brazil
 * Vitoria, Spain
 * Vittorio Veneto, Italy
 * Viviers, France
 * Volterra, Italy
 * Vrhbosna, Bosnia and Herzegovina

W

 * Wa, Ghana
 * Wabag, Papua New Guinea
 * Wagga Wagga, Australia
 * Wallis et Futuna, Wallis and Futuna
 * Wamba, Democratic Republic of the Congo
 * Wanxian, China
 * Warangal, India
 * Warmia, Poland
 * Warri, Nigeria
 * Warszawa, Poland
 * Warszawa-Praga, Poland
 * Washington, United States
 * Waterford and Lismore, Ireland
 * Wau, Sudan
 * Weetebula, Indonesia
 * Weihui, China
 * Wellington, New Zealand
 * Western Sahara, Apostolic prefecture, Western Sahara
 * Westminster, United Kingdom
 * Wewak, Papua New Guinea
 * Wheeling-Charleston, United States
 * Whitehorse, Canada
 * Wiawso, Ghana
 * Wichita, United States
 * Wien, Austria
 * Wilcannia-Forbes, Australia
 * Willemstad, Netherlands Antilles & Aruba
 * Wilmington, United States
 * Windhoek, Namibia
 * Winnipeg, Canada
 * Winnipeg, Canada
 * Winona, United States
 * Witbank, South Africa
 * Włocławek, Poland
 * Wollongong, Australia
 * Wonju, South Korea
 * Worcester, United States
 * Wrexham, United Kingdom
 * Wrocław, Poland
 * Wrocław-Gdańsk, Poland
 * Wuchang, China
 * Wuhu, China
 * Würzburg, Germany
 * Wuzhou, China

X

 * Xai-Xai, Mozambique
 * Xalapa, Mexico
 * Xiamen, China
 * Xi'an, China
 * Xiangyang, China
 * Xianxian, China
 * Xingu, Territorial Prelature, Brazil
 * Xinyang, China
 * Xiwanzi, China
 * Xuân Lôc, Vietnam
 * Xuanhua, China
 * Xuzhou, China

Y

 * Yagoua, Cameroon
 * Yakima, United States
 * Yamoussoukro, Côte d'Ivoire
 * Yan'an, China
 * Yanggu, China
 * Yangon (Rangoon), Burma
 * Yanji, China
 * Yantai, China
 * Yanzhou, China
 * Yaoundé, Cameroon
 * Yarmouth, Canada
 * Yauyos, Territorial Prelature, Peru
 * Yei, Sudan
 * Yendi, Ghana
 * Yingkou, China
 * Yizhou, China
 * Yokadouma, Cameroon
 * Yokohama, Japan
 * Yola, Nigeria
 * Yongjia, China
 * Yopal, Colombia
 * Yopougon, Côte d'Ivoire
 * Yoro, Honduras
 * Yucatán, Mexico
 * Youngstown, United States
 * Yuanling, China
 * Yuci, China
 * Yujiang, China
 * Yurimaguas, Apostolic Vicariate, Peru
 * Yuzhno Sakhalinsk, Apostolic prefecture, Russia

Z

 * Zacapa y Santo Cristo de Esquipulas, Guatemala
 * Zacatecas, Mexico
 * Zacatecoluca, El Salvador
 * Zadar, Croatia
 * Zagreb, Croatia
 * Zahleh, Lebanon
 * Zahleh and Furzol, Lebanon
 * Zaku, Iraq
 * Zamboanga, Philippines
 * Zamora (in Ecuador), Apostolic Vicariate, Ecuador
 * Zamora (in Mexico), Mexico
 * Zamora (in Spain), Spain
 * Zamość-Lubaczów, Poland
 * Zanzibar, Tanzania
 * Zaragoza, Spain
 * Zárate-Campana, Argentina
 * Zaria, Nigeria
 * Zé Doca, Brazil
 * Zhaotong (Chaotung), Apostolic Prefecture, China PR
 * Zhaoxian, China
 * Zhengding, China
 * Zhengzhou, China
 * Zhoucun, China
 * Zhouzhi, China
 * Zhumadian, China
 * Zielona Góra-Gorzów, Poland
 * Ziguinchor, Senegal
 * Žilina, Slovakia
 * Zipaquirá, Colombia
 * Zomba, Malawi
 * Zrenjanin, Serbia
 * }

List of Personal dioceses and ordinariates

 * Latin Church
 * Opus Dei, the only personal prelature with a cathedral see (Santa Maria della Pace ai Parioli) in Rome, ranking as bishopric
 * São João Maria Vianney, the only Personal Apostolic Administration
 * Personal Ordinariates 
 * Chair of Saint Peter, for Canada and USA, with cathedral see in Houston, Texas
 * Our Lady of the Southern Cross, for Australia and Japan
 * Our Lady of Walsingham, for England and Wales and for Scotland, i.e. Great Britain

List of Lists of Catholic dioceses

 * List of Catholic dioceses (structured view) (including episcopal conferences)

Lists of types of Catholic jurisdictions

 * List of Roman Catholic archdioceses
 * Military ordinariate
 * List of Roman Catholic apostolic administrations
 * List of Roman Catholic apostolic vicariates
 * List of Eastern Catholic exarchates
 * List of Roman Catholic apostolic prefectures
 * List of Roman Catholic territorial prelatures
 * List of Roman Catholic missions sui juris

Dioceses (or (arch)eparchies) of the Eastern Catholic Churches

 * List of Armenian dioceses
 * List of Chaldean dioceses
 * Coptic Catholic dioceses
 * Ethiopic Catholic dioceses
 * Melkite Catholic dioceses
 * Maronite dioceses
 * Ruthenian dioceses
 * Syro-Malabar Catholic dioceses
 * Syriac Catholic dioceses
 * Ukrainian Greek Catholic dioceses

Europe

 * List of Catholic dioceses in Albania
 * List of Catholic dioceses in Austria
 * List of Catholic dioceses in Belarus
 * List of Catholic dioceses in Belgium
 * List of Catholic dioceses in Bosnia and Herzegovina
 * List of Catholic dioceses in Croatia
 * List of Catholic dioceses in the Czech Republic
 * List of Catholic dioceses in Great Britain (UK)
 * List of Catholic dioceses in France
 * List of Catholic dioceses in Germany
 * List of Catholic dioceses in Greece
 * List of Catholic dioceses in Hungary
 * List of Catholic dioceses in Ireland (including Northern Ireland, UK)
 * List of Catholic dioceses in Italy
 * List of Catholic dioceses in Latvia
 * List of Catholic dioceses in Lithuania
 * List of Catholic dioceses in Montenegro
 * List of Catholic dioceses in the Netherlands
 * List of Catholic dioceses in Poland
 * List of Catholic dioceses in Portugal
 * List of Catholic dioceses in Romania
 * List of Catholic dioceses in Russia
 * List of Catholic dioceses in Serbia
 * List of Catholic dioceses in Slovakia
 * List of Catholic dioceses in Slovenia
 * List of Catholic dioceses in Spain
 * List of Catholic dioceses in Switzerland
 * List of Catholic dioceses in Ukraine

Asia

 * List of Catholic dioceses in Bangladesh
 * List of Catholic dioceses in Myanmar
 * List of Catholic dioceses in China (includes People's Republic of China and Taiwan)
 * List of Catholic dioceses in East Timor
 * List of Catholic dioceses in India
 * List of Catholic dioceses in Indonesia
 * List of Catholic dioceses in Iran
 * List of Catholic dioceses in Japan
 * List of Catholic dioceses in Korea
 * List of Catholic dioceses in Malaysia
 * List of Catholic dioceses in Pakistan
 * List of Catholic dioceses in the Philippines
 * List of Catholic dioceses in Sri Lanka and the Maldives
 * List of Catholic dioceses in Thailand
 * List of Catholic dioceses in Vietnam

Americas and Oceania

 * List of Roman Catholic dioceses in Argentina
 * List of Roman Catholic dioceses in Australia
 * List of Roman Catholic dioceses in Bolivia
 * List of Catholic dioceses in Brazil
 * List of Catholic dioceses in Canada
 * List of Roman Catholic dioceses in Chile
 * List of Roman Catholic dioceses in Colombia
 * List of Roman Catholic dioceses in Costa Rica
 * List of Roman Catholic dioceses in Cuba
 * List of Roman Catholic dioceses in the Dominican Republic
 * List of Roman Catholic dioceses in Ecuador
 * List of Roman Catholic dioceses in El Salvador
 * List of Roman Catholic dioceses in Guatemala
 * List of Roman Catholic dioceses in Haiti
 * List of Roman Catholic dioceses in Honduras
 * List of Roman Catholic dioceses in Mexico
 * List of Roman Catholic dioceses in New Zealand
 * List of Roman Catholic dioceses in Nicaragua
 * List of Catholic dioceses in North America
 * List of Catholic dioceses in Oceania
 * List of Roman Catholic dioceses in Panama
 * List of Roman Catholic dioceses in Papua New Guinea
 * List of Roman Catholic dioceses in Paraguay
 * List of Roman Catholic dioceses in Peru
 * List of the Catholic dioceses of the United States
 * List of Roman Catholic dioceses in Uruguay
 * List of Roman Catholic dioceses in Venezuela

Africa

 * List of Roman Catholic dioceses in Angola
 * List of Roman Catholic dioceses in Benin
 * List of Roman Catholic dioceses in Botswana
 * List of Roman Catholic dioceses in Burkina Faso
 * List of Roman Catholic dioceses in Burundi
 * List of Roman Catholic dioceses in Cameroon
 * List of Roman Catholic dioceses in Cape Verde
 * List of Roman Catholic dioceses in the Central African Republic
 * List of Roman Catholic dioceses in Chad
 * List of Roman Catholic dioceses in the Republic of the Congo
 * List of Roman Catholic dioceses in the Democratic Republic of the Congo
 * List of Roman Catholic dioceses in Djibouti
 * List of Roman Catholic dioceses in Egypt
 * List of Roman Catholic dioceses in Equatorial Guinea
 * List of Catholic dioceses in Ethiopia
 * List of Roman Catholic dioceses in Gabon
 * List of Roman Catholic dioceses in the Gambia
 * List of Roman Catholic dioceses in Ghana
 * List of Roman Catholic dioceses in Guinea
 * List of Roman Catholic dioceses in Guinea-Bissau
 * List of Roman Catholic dioceses in Ivory Coast
 * List of Roman Catholic dioceses in Kenya
 * List of Roman Catholic dioceses in Lesotho
 * List of Roman Catholic dioceses in Liberia
 * List of Roman Catholic dioceses in Libya
 * List of Roman Catholic dioceses in Madagascar
 * List of Roman Catholic dioceses in Malawi
 * List of Roman Catholic dioceses in Mali
 * List of Roman Catholic dioceses in Mauritania
 * List of Roman Catholic dioceses in Mauritius
 * List of Roman Catholic dioceses in Morocco
 * List of Roman Catholic dioceses in Mozambique
 * List of Roman Catholic dioceses in Namibia
 * List of Roman Catholic dioceses in Niger
 * List of Roman Catholic dioceses in Nigeria
 * List of Roman Catholic dioceses in Réunion
 * List of Roman Catholic dioceses in Rwanda
 * List of Roman Catholic dioceses in São Tomé and Príncipe
 * List of Roman Catholic dioceses in Senegal
 * List of Roman Catholic dioceses in Sierra Leone
 * List of Roman Catholic dioceses in Somalia
 * List of Roman Catholic dioceses in South Africa
 * List of Roman Catholic dioceses in South Sudan
 * List of Roman Catholic dioceses in Sudan
 * List of Roman Catholic dioceses in Swaziland
 * List of Roman Catholic dioceses in Tanzania
 * List of Roman Catholic dioceses in Uganda
 * List of Roman Catholic dioceses in Zambia

Other Christian denominations

 * List of Anglican dioceses and archdioceses
 * List of Lutheran dioceses and archdioceses
 * List of Orthodox dioceses and archdioceses

Sources and external links

 * Catholic-Hierarchy.org – lists every diocese in the Catholic Church, and their bishops throughout history.
 * Catholic-Hierarchy.org – lists every diocese in the Catholic Church, and their bishops throughout history.