List of sovereign states in the 1930s

This is a list of sovereign states in the 1930s, giving an overview of states around the world during the period between 1 January 1930 and 31 December 1939. It contains entries, arranged alphabetically, with information on the status and recognition of their sovereignty. It includes 77 widely recognized sovereign states, entities which were de facto sovereign but which were not widely recognized by other states, and 1 state which was initially unrecognized but then gained full recognition later in the decade.

Sovereign states
{|border="0" cellpadding="0" style="text-align:left; font-size: 95%; border-collapse: collapse; border'': 0px solid #AAAAAA;" !width=60%|Name and capital city !width=40%|Information on status and recognition of sovereignty
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A

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Widely recognized independent state. LON member state (from 27 September 1934).
 * valign=top|🇦🇫 → 🇦🇫 Afghanistan – Kingdom of Afghanistan
 * valign=top|🇦🇫 → 🇦🇫 Afghanistan – Kingdom of Afghanistan
 * colspan=2|
 * colspan=2|

Widely recognized LON member state. Under occupation by Italy from April 12, 1939.
 * valign=top|🇦🇱 Albania – Albanian Kingdom (to April 12, 1939)
 * valign=top|🇦🇱 Albania – Albanian Kingdom (to April 12, 1939)
 * colspan=2|
 * colspan=2|

Widely recognized independent state.
 * valign=top| → Andorra vlag 1939 2.svg Andorra – Principality of Andorra
 * valign=top| → Andorra vlag 1939 2.svg Andorra – Principality of Andorra
 * colspan=2|
 * colspan=2|

Widely recognized LON member state. Argentina was a federation of 15 provinces and 9 federal territories. It had a claim over Argentine Antarctica. It also claimed the Falkland Islands and South Georgia and the South Sandwich Islands, both of which were British crown colonies.
 * valign=top|🇦🇷 Argentina – Argentine Republic
 * valign=top|🇦🇷 Argentina – Argentine Republic
 * colspan=2|
 * colspan=2|

Widely recognized state. Annexed into Italian East Africa.
 * valign=top| Aussa – Sultanate of Aussa (to 1936)
 * valign=top| Aussa – Sultanate of Aussa (to 1936)
 * colspan=2|
 * colspan=2|

Widely recognized LON member state; Commonwealth realm. Australia was a federation of six states and three territories. It had sovereignty over the following external territories:
 * valign=top|🇦🇺 Australia – Commonwealth of Australia
 * valign=top|🇦🇺 Australia – Commonwealth of Australia
 * 🇦🇺 Australian Antarctic Territory (from 1933)
 * 🇦🇺 Norfolk Island
 * undefined

Australia administered two League of Nations mandates:
 * 🇦🇺 Nauru (Administered by Australia, New Zealand and the United Kingdom)
 * 🇦🇺 New Guinea
 * colspan=2|
 * colspan=2|

Widely recognized LON member state. Annexed by Nazi Germany on March 12, 1938.
 * valign=top| → Austria (to March 12, 1938)
 * Republic of Austria (to May 1, 1934)
 * Federal State of Austria (from May 1, 1934 to March 12, 1938)
 * Federal State of Austria (from May 1, 1934 to March 12, 1938)
 * colspan=2|
 * colspan=2|


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B

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 * colspan=2|

Widely recognized LON member state. Belgium had sovereignty over one colony and one concession: Belgium administered one League of Nations mandate:
 * valign=top|🇧🇪 Belgium – Kingdom of Belgium
 * valign=top|🇧🇪 Belgium – Kingdom of Belgium
 * Belgian Congo (Colony)
 * 🇧🇪 Tientsin (Concession, to January 15, 1931)
 * 🇧🇪 Ruanda-Urundi (Administrative union with the Belgian Congo)
 * colspan=2|
 * colspan=2|


 * valign=top|🇧🇴 Bolivia
 * valign=top|🇧🇴 Bolivia

Capital: Sucre (official), La Paz (administrative) Widely recognized independent state.
 * Republic of Bolivia (to 17 May 1936)
 * Republic of Bolivia (from 17 May 1936)
 * colspan=2|
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Widely recognized independent state. Brazil was a federation of 20 states, one territory, and one federal district.
 * valign=top|🇧🇷 Brazil
 * First Brazilian Republic (to 3 November 1930)
 * Vargas Era (from 3 November 1930 to 10 November 1937)
 * Estado Novo (from 10 November 1937)
 * Estado Novo (from 10 November 1937)
 * colspan=2|
 * colspan=2|

Widely recognized LON member state.
 * valign=top|🇧🇬 Bulgaria – Kingdom of Bulgaria
 * valign=top|🇧🇬 Bulgaria – Kingdom of Bulgaria
 * colspan=2|
 * colspan=2|


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C

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 * colspan=2|

Widely recognized LON member state; Commonwealth realm.
 * valign=top|🇨🇦 Canada – Dominion of Canada
 * valign=top|🇨🇦 Canada – Dominion of Canada
 * colspan=2|
 * colspan=2|

Widely recognized LON member state; withdrew on May 14, 1938.
 * valign=top|🇨🇱 Chile
 * Republic of Chile (to June 4, 1932)
 * Socialist Republic of Chile (from June 4 to September 13, 1932)
 * Republic of Chile (from September 13, 1932)
 * Republic of Chile (from September 13, 1932)
 * colspan=2|
 * colspan=2|

Widely recognized LON member state.
 * valign=top| undefined – Republic of China
 * valign=top| undefined – Republic of China
 * colspan=2|
 * colspan=2|

Widely recognized LON member state.
 * valign=top|🇨🇴 Colombia – Republic of Colombia
 * valign=top|🇨🇴 Colombia – Republic of Colombia
 * colspan=2|
 * colspan=2|

Widely recognized independent state.
 * valign=top|🇨🇷 Costa Rica – Republic of Costa Rica
 * valign=top|🇨🇷 Costa Rica – Republic of Costa Rica
 * colspan=2|
 * colspan=2|

Widely recognized LON member state.
 * valign=top| undefined – Republic of Cuba
 * valign=top| undefined – Republic of Cuba
 * colspan=2|
 * colspan=2|

Widely recognized LON member state. Under occupation by Nazi Germany from 15 May 1939. A government in exile was regarded as the legitimate government by the Allies.
 * valign=top| Czechoslovakia (to 14 March 1939)
 * First Czechoslovak Republic (to 30 September 1938)
 * Second Czechoslovak Republic (from 30 September 1938 to 14 March 1939)
 * Second Czechoslovak Republic (from 30 September 1938 to 14 March 1939)
 * colspan=2|
 * colspan=2|


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D

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Widely recognized independent state. Annexed by Nazi Germany from 12 September 1939.
 * valign=top| Danzig – Free City of Danzig (to 12 September 1939)
 * valign=top| Danzig – Free City of Danzig (to 12 September 1939)
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Widely recognized LON member state. Denmark had sovereignty over one possession:
 * valign=top|🇩🇰 Denmark – Kingdom of Denmark
 * valign=top|🇩🇰 Denmark – Kingdom of Denmark
 * 🇩🇰 Greenland
 * colspan=2|
 * colspan=2|

Widely recognized LON member state.
 * valign=top|🇩🇴 Dominican Republic – Third Dominican Republic
 * valign=top|🇩🇴 Dominican Republic – Third Dominican Republic
 * colspan=2|
 * colspan=2|


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E

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Widely recognized independent state. LON member state from September 28, 1934.
 * valign=top|Flag of Ecuador (1900-2009).svg Ecuador – Republic of Ecuador
 * valign=top|Flag of Ecuador (1900-2009).svg Ecuador – Republic of Ecuador
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Widely recognized independent state. LON member state from May 26, 1937.
 * valign=top| Egypt – Kingdom of Egypt
 * valign=top| Egypt – Kingdom of Egypt
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Widely recognized LON member state; withdrew on August 11, 1937.
 * valign=top|🇸🇻 El Salvador
 * Republic of El Salvador (to 2 December 1931)
 * Military dictatorship (from 2 December 1931)
 * Military dictatorship (from 2 December 1931)
 * colspan=2|
 * colspan=2|

Widely recognized LON member state.
 * valign=top|🇪🇪 Estonia – Republic of Estonia
 * valign=top|🇪🇪 Estonia – Republic of Estonia
 * colspan=2|
 * colspan=2|

Widely recognized LON member state. Under occupation by Italy from May 9, 1936, and annexed into Italian East Africa from June 1, 1936.
 * valign=top| undefined – Ethiopian Empire (to 9 May 1936)
 * valign=top| undefined – Ethiopian Empire (to 9 May 1936)
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F

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 * colspan=2|

Widely recognized LON member state.
 * valign=top|🇫🇮 Finland – Republic of Finland
 * valign=top|🇫🇮 Finland – Republic of Finland
 * colspan=2|
 * colspan=2|

Widely recognized LON member state. France administered the foreign affairs of the following colonies and protectorates:
 * valign=top|🇫🇷 France – French Republic
 * valign=top|🇫🇷 France – French Republic
 * 🇫🇷 French Algeria (de jure Department of Metropolitan France, de facto Colony)
 * 🇫🇷 French Equatorial Africa (Colony)
 * 🇫🇷 French Guiana (Colony)
 * 🇫🇷 French India – French Establishments in India (Colony)
 * 🇫🇷 French Indochina (Federation of protectorates)
 * 🇫🇷 French Madagascar (Colony)
 * French Morocco (Protectorate)
 * 🇫🇷 French Oceania – French Establishments in Oceania (Colony)
 * 🇫🇷 French Somaliland (Colony)
 * French Tunisia (Protectorate)
 * 🇫🇷 French West Africa (Colony)
 * 🇫🇷 Guadeloupe (Colony)
 * 🇫🇷 Inini (Colony from June 6, 1930)
 * 🇫🇷 French Madagascar (Colony)
 * 🇫🇷 Martinique (Colony)

France administered the following League of Nations mandates:
 * Alawite (to December 3, 1936)
 * Lebanese Republic
 * State of Syria (to May 14, 1930)
 * → Syrian Republic (from May 14, 1930)
 * Jabal ad-Druze (to September 9, 1936)
 * 🇫🇷 French Cameroons
 * 🇫🇷 French Togoland
 * Saar Basin (Administered by the United Kingdom and France to March 1, 1935)
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G

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Widely recognized LON member state; withdrew on October 19, 1933.
 * valign=top| → →  Germany
 * Weimar Republic (to March 23, 1933)
 * Nazi Germany (from March 23, 1933)
 * Nazi Germany (from March 23, 1933)
 * colspan=2|
 * colspan=2|

Widely recognized LON member state.
 * valign=top| → Greece
 * Hellenic Republic (to 3 November 1935)
 * Kingdom of Greece (from 3 November 1935)
 * Kingdom of Greece (from 3 November 1935)
 * colspan=2|
 * colspan=2|

Widely recognized LON member state; withdrew on May 26, 1936.
 * valign=top|🇬🇹 Guatemala – Republic of Guatemala
 * valign=top|🇬🇹 Guatemala – Republic of Guatemala
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 * colspan=2|


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H

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 * colspan=2|

Widely recognized LON member state under United States occupation to August 1, 1934.
 * valign=top|🇭🇹 Haiti – Republic of Haiti
 * valign=top|🇭🇹 Haiti – Republic of Haiti
 * colspan=2|
 * colspan=2|

Widely recognized independent state. Annexed by Turkey from 7 July 1939.
 * valign=top| Hatay – Hatay State (from 7 September 1938 to 7 July 1939)
 * valign=top| Hatay – Hatay State (from 7 September 1938 to 7 July 1939)
 * colspan=2|
 * colspan=2|

Widely recognized LON member state; withdrew on July 10, 1936.
 * valign=top|🇭🇳 Honduras
 * Republic of Honduras (to November 16, 1932)
 * Republic of Honduras (from November 16, 1932)
 * Republic of Honduras (from November 16, 1932)
 * colspan=2|
 * colspan=2|

Widely recognized LON member state; withdrew on April 11, 1939.
 * valign=top| undefined – Kingdom of Hungary
 * valign=top| undefined – Kingdom of Hungary
 * colspan=2|
 * colspan=2|


 * colspan=2|
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I

 * colspan=2|
 * colspan=2|

Widely recognized independent state.
 * valign=top| Kingdom of Iceland – Kingdom of Iceland
 * valign=top| Kingdom of Iceland – Kingdom of Iceland
 * colspan=2|
 * colspan=2|

Widely recognized LON member state.
 * valign=top|🇮🇷 Persia / Iran
 * Imperial State of Persia (to 21 March 1935)
 * Imperial State of Iran (from 21 March 1935)
 * Imperial State of Iran (from 21 March 1935)
 * colspan=2|
 * colspan=2|

Widely recognized independent state. LON member state from October 3, 1932.
 * valign=top|🇮🇶 Iraq – Hashemite Kingdom of Iraq (from 3 October 1932)
 * valign=top|🇮🇶 Iraq – Hashemite Kingdom of Iraq (from 3 October 1932)
 * colspan=2|
 * colspan=2|

Widely recognized LON member state; Commonwealth realm.
 * valign=top|🇮🇪 Ireland
 * Irish Free State (to December 29, 1937)
 * Republic of Ireland (from December 29, 1937)
 * Republic of Ireland (from December 29, 1937)
 * colspan=2|
 * colspan=2|

Widely recognized LON member state under fascism; withdrew on December 11, 1937. Italy had sovereignty over two colonies (four colonies until January 1934 and three colonies until June 1936) and three concessions:
 * valign=top| undefined – Kingdom of Italy
 * valign=top| undefined – Kingdom of Italy
 * Amoy (Concession)
 * Italian Cyrenaica (Colony, to 1 January 1934)
 * Italian Tripolitania (Colony, to 1 January 1934)
 * Italian Libya (Colony, from 1 January 1934)
 * Italian Eritrea (Colony, to 1 June 1936)
 * Italian Somaliland (Colony, to 1 June 1936)
 * Italian East Africa (Colony, from 1 June 1936)
 * Shanghai (Concession)
 * Tientsin (Concession)
 * colspan=2|
 * colspan=2|


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J

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 * colspan=2|

Widely recognized LON member state; withdrew on March 27, 1933. Japan had sovereignty over the following dependencies and concessions:
 * valign=top| undefined – Empire of Japan
 * valign=top| undefined – Empire of Japan
 * Chongqing (Concession until 1937)
 * Hangzhou (Concession)
 * Hankou (Concession)
 * Japanese Korea (Chōsen) (Dependency)
 * Karafuto (Dependency)
 * Kwantung (Concession)
 * Shashi (Concession)
 * Suzhou (Concession)
 * Taiwan (Dependency)
 * Tientsin (Concession)

Japan administered one League of Nations mandate:
 * South Seas Mandate
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L

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 * colspan=2|

Widely recognized LON member state.
 * valign=top|🇱🇻 Latvia – Republic of Latvia
 * valign=top|🇱🇻 Latvia – Republic of Latvia
 * colspan=2|
 * colspan=2|

Widely recognized LON member state.
 * valign=top|🇱🇷 Liberia – Republic of Liberia
 * valign=top|🇱🇷 Liberia – Republic of Liberia
 * colspan=2|
 * colspan=2|

Widely recognized independent state.
 * valign=top|🇱🇮 →  Liechtenstein – Principality of Liechtenstein
 * valign=top|🇱🇮 →  Liechtenstein – Principality of Liechtenstein
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 * colspan=2|

Widely recognized LON member state.
 * valign=top|🇱🇹 Lithuania – Republic of Lithuania
 * valign=top|🇱🇹 Lithuania – Republic of Lithuania
 * colspan=2|
 * colspan=2|

Widely recognized LON member state.
 * valign=top|🇱🇺 Luxembourg – Grand Duchy of Luxembourg
 * valign=top|🇱🇺 Luxembourg – Grand Duchy of Luxembourg
 * colspan=2|
 * colspan=2|


 * colspan=2|
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M

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 * colspan=2|

Widely recognized independent state. LON member state from September 12, 1931; declared a member on September 12, 1931. Mexico had sovereignty over one territory:
 * valign=top|🇲🇽 → 🇲🇽 Mexico – United Mexican States
 * valign=top|🇲🇽 → 🇲🇽 Mexico – United Mexican States
 * 🇲🇽 Isla de la Pasión (uninhabited territory, to January 28, 1931)
 * colspan=2|
 * colspan=2|

Widely recognized independent state.
 * valign=top|🇲🇨 Monaco – Principality of Monaco
 * valign=top|🇲🇨 Monaco – Principality of Monaco
 * colspan=2|
 * colspan=2|


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N

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 * colspan=2|

Widely recognized independent state. Nejd and Hejaz had sovereignty over one protectorate:
 * valign=top| → →  →  Nejd and Hejaz – (personal union to 23 September 1932), Saudi Arabia (from September 23, 1932)
 * – Kingdom of Nejd and Hejaz (to September 23, 1932)
 * → →  Kingdom of Saudi Arabia (from September 23, 1932)
 * → →  Kingdom of Saudi Arabia (from September 23, 1932)
 * Asir (to November 20, 1930)
 * colspan=2|
 * colspan=2|

Widely recognized independent state.
 * valign=top| Nepal – Kingdom of Nepal
 * valign=top| Nepal – Kingdom of Nepal
 * colspan=2|
 * colspan=2|

Widely recognized LON member state. The Netherlands had sovereignty over three colonies:
 * valign=top|🇳🇱 Netherlands – Kingdom of the Netherlands
 * valign=top|🇳🇱 Netherlands – Kingdom of the Netherlands
 * 🇳🇱 Curaçao and Dependencies
 * 🇳🇱 Dutch East Indies
 * 🇳🇱 Surinam
 * colspan=2|
 * colspan=2|

Widely recognized independent state; de facto Commonwealth realm to February 16, 1934.
 * valign=top| undefined – Dominion of Newfoundland (de facto to February 16, 1934)
 * valign=top| undefined – Dominion of Newfoundland (de facto to February 16, 1934)
 * colspan=2|
 * colspan=2|

Widely recognized LON member state; Commonwealth realm. New Zealand had sovereignty over four dependent territories:
 * valign=top|🇳🇿 New Zealand – Dominion of New Zealand
 * valign=top|🇳🇿 New Zealand – Dominion of New Zealand
 * 🇳🇿 Cook Islands (Dependent territory)
 * 🇳🇿 Niue Island (Dependent territory)
 * 🇳🇿 Ross Dependency (Uninhabited dependent territory)
 * 🇳🇿 Union Islands (Dependent territory)

New Zealand administered one League of Nations mandate:
 * 🇼🇸 Western Samoa
 * colspan=2|
 * colspan=2|

Widely recognized LON member state under United States occupation to 1933; withdrew on June 27, 1936.
 * valign=top|🇳🇮 Nicaragua – Republic of Nicaragua
 * valign=top|🇳🇮 Nicaragua – Republic of Nicaragua
 * colspan=2|
 * colspan=2|

Widely recognized LON member state. Norway had sovereignty over three uninhabited possessions:
 * valign=top|🇳🇴 Norway – Kingdom of Norway
 * valign=top|🇳🇴 Norway – Kingdom of Norway
 * 🇳🇴 Bouvet Island
 * 🇳🇴 Peter I Island (from March 6, 1931)
 * 🇳🇴 Sverdrup Islands (to November 11, 1930)
 * colspan=2|
 * colspan=2|


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P

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 * colspan=2|

Widely recognized LON member state.
 * valign=top|🇵🇦 Panama – Republic of Panama
 * valign=top|🇵🇦 Panama – Republic of Panama
 * colspan=2|
 * colspan=2|

Widely recognized LON member state; withdrew on February 23, 1935.
 * valign=top|🇵🇾 Paraguay – Republic of Paraguay
 * valign=top|🇵🇾 Paraguay – Republic of Paraguay
 * colspan=2|
 * colspan=2|

Widely recognized LON member state; withdrew on April 8, 1939.
 * valign=top|🇵🇪 Peru – Peruvian Republic
 * valign=top|🇵🇪 Peru – Peruvian Republic
 * colspan=2|
 * colspan=2|

Widely recognized LON member state. Under occupation by Nazi Germany from 6 October 1939. A government in exile was regarded as the legitimate government by the Allies.
 * valign=top|🇵🇱 Poland – Republic of Poland (to 6 October 1939)
 * valign=top|🇵🇱 Poland – Republic of Poland (to 6 October 1939)
 * colspan=2|
 * colspan=2|

Widely recognized LON member state. The following are colonies and possession of Portugal:
 * valign=top| Portugal
 * Ditadura Nacional (to 19 March 1933)
 * Estado Novo (from 11 April 1933)
 * Estado Novo (from 11 April 1933)
 * Portuguese Cape Verde (Colony)
 * 🇵🇹 Portuguese Macau (Colony)
 * 🇵🇹 Portuguese East Africa (Colony)
 * Portuguese Guinea (Colony)
 * 🇵🇹 Portuguese India (Colony)
 * Portuguese Timor (Colony)
 * 🇵🇹 Portuguese West Africa (Colony)
 * 🇵🇹 Fort of São João Baptista de Ajudá (Possession)
 * 🇵🇹 Portuguese São Tomé and Príncipe (Colony)
 * colspan=2|
 * colspan=2|


 * colspan=2|
 * colspan=2|

R

 * colspan=2|
 * colspan=2|

Widely recognized LON member state.
 * valign=top| undefined – Kingdom of Romania
 * valign=top| undefined – Kingdom of Romania
 * colspan=2|
 * colspan=2|


 * colspan=2|
 * colspan=2|

S

 * colspan=2|
 * colspan=2|

Widely recognized independent state.
 * valign=top|🇸🇲 San Marino – Most Serene Republic of San Marino
 * valign=top|🇸🇲 San Marino – Most Serene Republic of San Marino
 * colspan=2|
 * colspan=2|

Widely recognized LON member state.
 * valign=top| Siam / Thailand
 * Kingdom of Siam (to 23 June 1939)
 * Kingdom of Thailand (from 23 June 1939)
 * Kingdom of Thailand (from 23 June 1939)
 * colspan=2|
 * colspan=2|

Widely recognized LON member state; Commonwealth realm. South Africa administered one League of Nations mandate:
 * valign=top| undefined – Union of South Africa Capital: Pretoria (administrative), Cape Town (legislative), Pietermaritzburg (archival), Bloemfontein (judicial)
 * valign=top| undefined – Union of South Africa Capital: Pretoria (administrative), Cape Town (legislative), Pietermaritzburg (archival), Bloemfontein (judicial)
 * South West Africa
 * colspan=2|
 * colspan=2|

Widely recognized independent state. LON member state from September 18, 1934; expelled on December 14, 1939. The Soviet Union was a federation of seven (later 11) republics.
 * valign=top| Soviet Union – Union of Soviet Socialist Republics
 * valign=top| Soviet Union – Union of Soviet Socialist Republics
 * colspan=2|
 * colspan=2|

Capital: Madrid (1930–1936), Valencia (1936–1937), Barcelona (1937–1939) Widely recognized LON member state; withdrew on May 9, 1939. Spain had sovereignty over the following colonies and protectorate:
 * valign=top|🇪🇸 → →  Spain
 * valign=top|🇪🇸 → →  Spain
 * Kingdom of Spain (to 14 April 1931)
 * Spanish Republic (from 14 April 1931 to 1 April 1939)
 * Spanish State (from 1 April 1939)
 * → 🇪🇸 Ifni (Colony from January 12, 1934)
 * 🇪🇸 → → 🇪🇸 Spanish Guinea (Colony)
 * 🇪🇸 → → 🇪🇸 Spanish Sahara (Colony)
 * 🇲🇦 Spanish Morocco (Protectorate)
 * colspan=2|
 * colspan=2|

Widely recognized LON member state.
 * valign=top|🇸🇪 Sweden – Kingdom of Sweden
 * valign=top|🇸🇪 Sweden – Kingdom of Sweden
 * colspan=2|
 * colspan=2|

Widely recognized LON member state.
 * valign=top|🇨🇭 Switzerland
 * Swiss Confederation (to 1 September 1939)
 * Swiss Confederation (from 1 September 1939)
 * Swiss Confederation (from 1 September 1939)
 * colspan=2|
 * colspan=2|


 * colspan=2|
 * colspan=2|

T

 * colspan=2|
 * colspan=2|

De facto independent state. Claimed by the Republic of China.
 * valign=top| Tibet
 * valign=top| Tibet
 * colspan=2|
 * colspan=2|

Widely recognized independent state. LON member state from July 18, 1932.
 * valign=top|🇹🇷 Turkey – Republic of Turkey
 * valign=top|🇹🇷 Turkey – Republic of Turkey
 * colspan=2|
 * colspan=2|


 * colspan=2|
 * colspan=2|

U

 * colspan=2|
 * colspan=2|

Widely recognized LON member state. The United Kingdom had sovereignty over 62 colonies:
 * valign=top|🇬🇧 United Kingdom – United Kingdom of Great Britain and Northern Ireland
 * valign=top|🇬🇧 United Kingdom – United Kingdom of Great Britain and Northern Ireland
 * Aden – Aden Colony and Protectorate (Crown colony from 1937 and protectorate)
 * Amoy (Concession until 1930)
 * Anglo-Egyptian Sudan (Condominium of the United Kingdom and the Kingdom of Egypt)
 * 🇧🇸 Bahamas (Crown colony)
 * Bahrain – State of Bahrain (Protectorate)
 * Baker Island (Uninhabited possession)
 * 🇧🇧 Barbados (Crown colony)
 * Basutoland – Territory of Basutoland (Crown colony)
 * Bechuanaland – Bechuanaland Protectorate (Protectorate)
 * Bermuda (Crown colony)
 * Bhutan – Kingdom of Bhutan (Independent state under Treaty of Punakha)
 * British Guiana (Crown colony)
 * British Honduras (Crown colony)
 * British Leeward Islands – Federal Colony of the Leeward Islands (Crown colony)
 * British Somaliland – British Somaliland Protectorate (Protectorate)
 * British Western Pacific Territories (Crown colony)
 * British Windward Islands – Federal Colony of the Windward Islands (Crown colony)
 * Brunei – State of Brunei (Protectorate)
 * → Burma (Crown colony from April 1, 1937)
 * Ceylon (Crown colony)
 * Cyprus (Crown colony)
 * Enderby Land (Uninhabited possession, from January 13, 1930 to June 13, 1933)
 * Falkland Islands (Crown colony)
 * Federated Malay States (Protectorate)
 * Gambia – Gambia Colony and Protectorate (Crown colony and protectorate)
 * 🇬🇮 Gibraltar (Crown colony)
 * Gold Coast (Crown colony)
 * Guernsey – Bailiwick of Guernsey (Crown dependency)
 * Heard Island and McDonald Islands (Uninhabited possession)
 * Hong Kong (Crown colony)
 * British Raj – Indian Empire (Crown colony)
 * Isle of Man (Crown dependency)
 * 🇯🇲 Jamaica (Crown colony)
 * Jarvis Island (Uninhabited possession)
 * 🇯🇪 Jersey – Bailiwick of Jersey (Crown dependency)
 * Johor – State of Johor Darul Ta'zim (Protectorate)
 * Kedah – State of Kedah Darul Aman (Protectorate)
 * Kelantan – State of Kelantan Darul Naim (Protectorate)
 * 🇰🇪 Kenya – Kenya Colony and Protectorate (Crown colony and protectorate)
 * Flag of Kuwait 1921-1940.png Kuwait – Sheikhdom of Kuwait (Protectorate)
 * Maldive Islands – Sultanate of the Maldive Islands (Protectorate)
 * 🇲🇹 Malta (Crown colony)
 * 🇲🇺 Mauritius (Crown colony)
 * Muscat and Oman – Sultanate of Muscat and Oman (State under the informal protection)
 * 🇳🇬 Nigeria – Colony and Protectorate of Nigeria (Crown colony and protectorate)
 * North Borneo (Protectorate)
 * Northern Rhodesia – Protectorate of Northern Rhodesia (Protectorate)
 * Nyasaland – Nyasaland Protectorate (Protectorate)
 * Perlis – State of Perlis Indera Kayangan (Protectorate)
 * Qatar – State of Qatar (Protectorate)
 * Saint Helena (Crown colony)
 * Sarawak – Kingdom of Sarawak (Protectorate)
 * Seychelles (Crown colony)
 * Sierra Leone – Sierra Leone Colony and Protectorate (Crown colony and protectorate)
 * Sikkim (Independent state under the Treaty of Tumlong)
 * South Orkney Islands (Uninhabited possession)
 * Southern Rhodesia – Colony of Southern Rhodesia (Crown colony)
 * South Shetland Islands (Uninhabited possession)
 * Straits Settlements (Crown colony)
 * Swaziland – Swaziland Protectorate (Protectorate)
 * Terengganu – State of Terengganu Darul Iman (Protectorate)
 * Tientsin (Concession)
 * 🇹🇹 Trinidad and Tobago (Crown colony)
 * Tristan da Cunha (Crown colony)
 * Trucial States (Protectorate)
 * 🇺🇬 Uganda (Protectorate)
 * Victoria Land (Uninhabited possession)
 * Weihaiwei (Concession, to October 1, 1930)
 * Zanzibar (Protectorate)

United Kingdom administered the following League of Nations mandates:
 * British Cameroons
 * British Togoland
 * 🇮🇶 Iraq (to October 3, 1932)
 * Palestine
 * 🇯🇴 Transjordan
 * Saar Basin (Administered by the United Kingdom and France to March 1, 1935)
 * Tanganyika
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Widely recognized independent state. The United States had sovereignty over 21 territories:
 * valign=top|🇺🇸 United States – United States of America
 * valign=top|🇺🇸 United States – United States of America
 * Alaska – Alaska Territory (Territory)
 * 🇺🇸 American Samoa – Territory of American Samoa (Territory)
 * 🇺🇸 Corn Islands (Territory)
 * 🇺🇸 Guam – Territory of Guam (Territory)
 * Hawaii – Territory of Hawaii (Territory)
 * 🇺🇸 Howland Island (Uninhabited territory)
 * 🇺🇸 Johnston Atoll (Uninhabited territory)
 * 🇺🇸 Kingman Reef (Uninhabited territory)
 * 🇺🇸 Midway Atoll (Uninhabited territory)
 * 🇺🇸 Navassa Island (Uninhabited territory)
 * Panama Canal Zone (Territory)
 * 🇺🇸 Petrel Islands (Uninhabited territory)
 * 🇵🇭 Philippine Islands (Territory to November 15, 1935 to be reorganized as a commonwealth and a unincorporated territory )
 * 🇺🇸 Puerto Rico (Territory)
 * 🇺🇸 Quita Sueno Bank (Uninhabited territory)
 * 🇺🇸 Roncador Bank (Uninhabited territory)
 * 🇺🇸 Serrana Bank (Uninhabited territory)
 * 🇺🇸 Serranilla Bank (Uninhabited territory)
 * 🇺🇸 Swan Islands (Uninhabited territory)
 * United States Virgin Islands (Territory)
 * 🇺🇸 Wake Island (Uninhabited territory)
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Widely recognized LON member state.
 * valign=top|🇺🇾 Uruguay – Eastern Republic of Uruguay
 * valign=top|🇺🇾 Uruguay – Eastern Republic of Uruguay
 * colspan=2|
 * colspan=2|


 * colspan=2|
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V

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Widely recognized independent state.
 * valign=top|🇻🇦 Vatican City – Vatican City State
 * valign=top|🇻🇦 Vatican City – Vatican City State
 * colspan=2|
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Widely recognized LON member state; withdrew on July 12, 1938.
 * valign=top|🇻🇪 → 🇻🇪 Venezuela – United States of Venezuela
 * valign=top|🇻🇪 → 🇻🇪 Venezuela – United States of Venezuela
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Y

 * colspan=2|
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Widely recognized independent state.
 * valign=top|🇾🇪 Yemen – Mutawakkilite Kingdom of Yemen
 * valign=top|🇾🇪 Yemen – Mutawakkilite Kingdom of Yemen
 * colspan=2|
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Widely recognized independent state.
 * valign=top| Kingdom of Yugoslavia – Kingdom of Yugoslavia
 * valign=top| Kingdom of Yugoslavia – Kingdom of Yugoslavia
 * colspan=2|
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Other entities
Excluded from the list above are the following noteworthy entities which either were not fully sovereign or did not claim to be independent:
 * colspan=2|
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Unrecognized state.
 * valign=top| Ararat – Republic of Ararat (to September 17, 1930)
 * valign=top| Ararat – Republic of Ararat (to September 17, 1930)
 * colspan=2|
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Unrecognized state. Occupied by Hungary on March 15, 1939.
 * valign=top| Carpatho-Ukraine (from 30 December to 15 March 1939)
 * valign=top| Carpatho-Ukraine (from 30 December to 15 March 1939)
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Self-declared state in 1931; became an autonomous government within the Spanish Republic, named Generalitat of Catalonia, from April 17, 1931. Self-declared revolutionary state in 1934 during the Events of 6 October.
 * valign=top| Catalonia (from 14 to 17 April 1931 and from 6 to 7 October 1934)
 * Catalan Republic (from 14 to 17 April 1931)
 * Catalan State (from 6 to 7 October 1934)
 * Catalan State (from 6 to 7 October 1934)
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Unrecognized state. Puppet state of Japan.
 * valign=top| China, Provisional Government of – Provisional Government of the Republic of China (from December 14, 1937)
 * valign=top| China, Provisional Government of – Provisional Government of the Republic of China (from December 14, 1937)
 * colspan=2|
 * colspan=2|

Unrecognized state. Puppet state of Japan.
 * valign=top| China, Reformed Government of – Reformed Government of the Republic of China (from March 28, 1938)
 * valign=top| China, Reformed Government of – Reformed Government of the Republic of China (from March 28, 1938)
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Partially recognized socialist republic. Puppet state of the Soviet Union.
 * valign=top| Democratic Finland – Finnish Democratic Republic (from December 1, 1939) Capital: Helsinki (official), Terijoki (de facto)
 * valign=top| Democratic Finland – Finnish Democratic Republic (from December 1, 1939) Capital: Helsinki (official), Terijoki (de facto)
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 * colspan=2|

Unrecognized state. Puppet state of Japan.
 * valign=top| East Hebei – East Hebei Autonomous Council (from November 25, 1935 to February 1, 1938)
 * valign=top| East Hebei – East Hebei Autonomous Council (from November 25, 1935 to February 1, 1938)
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De facto unrecognized independent state. De jure regional province of China.
 * valign=top| East Turkestan – Turkish Islamic Republic of East Turkestan (from November 12, 1933 to February 6, 1934)
 * valign=top| East Turkestan – Turkish Islamic Republic of East Turkestan (from November 12, 1933 to February 6, 1934)
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 * colspan=2|

Unrecognized state.
 * valign=top| Jiangxi – Chinese Soviet Republic (from November 7, 1931 to September 22, 1937) Capital: Ruijin (1931–1936), Bao'an (1936–1937), Yan'an (1937)
 * valign=top| Jiangxi – Chinese Soviet Republic (from November 7, 1931 to September 22, 1937) Capital: Ruijin (1931–1936), Bao'an (1936–1937), Yan'an (1937)
 * colspan=2|
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Partially recognized Korean government-in-exile.
 * valign=top| Korea, Provisional Government of – Provisional Government of the Republic of Korea Capital-in-exile: Shanghai (to 1932), Hangzhou (1932–1935), Jiaxing (1935), Nanjing (1935–1937), Changsha (1937–1938), Canton (1938–1939), Qijiang (from 1939)
 * valign=top| Korea, Provisional Government of – Provisional Government of the Republic of Korea Capital-in-exile: Shanghai (to 1932), Hangzhou (1932–1935), Jiaxing (1935), Nanjing (1935–1937), Changsha (1937–1938), Canton (1938–1939), Qijiang (from 1939)
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Puppet state of Japan.
 * valign=top| Manchukuo (from February 18, 1932)
 * State of Manchuria (from February 18, 1932 to March 1, 1934)
 * Empire of Manchuria (from March 1, 1934)
 * Empire of Manchuria (from March 1, 1934)
 * colspan=2|
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Puppet state of Japan.
 * valign=top| Mengjiang – Mengjiang United Autonomous Government (from September 1, 1939)
 * valign=top| Mengjiang – Mengjiang United Autonomous Government (from September 1, 1939)
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Satellite state of the Soviet Union.
 * valign=top|🇲🇳 Mongolia – Mongolian People's Republic
 * valign=top|🇲🇳 Mongolia – Mongolian People's Republic
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 * colspan=2|

Puppet state of Japan. Became part of Mengjiang from September 1, 1939.
 * valign=top| Mongol Union (from May 12, 1936 to September 1, 1939)
 * Mongol Military Government (from May 12, 1936 to October 27, 1937)
 * Mongol United Autonomous Government (from October 27, 1937 to September 1, 1939)
 * Mongol United Autonomous Government (from October 27, 1937 to September 1, 1939)
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Puppet state of Japan. Became part of Mengjiang from September 1, 1939.
 * valign=top| North Shanxi – North Shanxi Autonomous Government (from October 15, 1937 to September 1, 1939)
 * valign=top| North Shanxi – North Shanxi Autonomous Government (from October 15, 1937 to September 1, 1939)
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 * colspan=2|

Puppet government of Japan.
 * valign=top| Shanghai – Great Way Municipal Government of Shanghai (from December 5, 1937 to May 3, 1938)
 * valign=top| Shanghai – Great Way Municipal Government of Shanghai (from December 5, 1937 to May 3, 1938)
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Client state of Nazi Germany recognized by several neutral states.
 * valign=top|🇸🇰 Slovakia – Slovak Republic (from March 14, 1939)
 * valign=top|🇸🇰 Slovakia – Slovak Republic (from March 14, 1939)
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Puppet state of Japan. Became part of Mengjiang from September 1, 1939.
 * valign=top| South Chahar – South Chahar Autonomous Government (from September 4, 1937 to September 1, 1939)
 * valign=top| South Chahar – South Chahar Autonomous Government (from September 4, 1937 to September 1, 1939)
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Partially recognized socialist republic. Satellite state of the Soviet Union.
 * valign=top| → Tuva – Tuvan People's Republic Capital: Khem-Beldyr (renamed Kyzyl in 1926)
 * valign=top| → Tuva – Tuvan People's Republic Capital: Khem-Beldyr (renamed Kyzyl in 1926)
 * colspan=2|
 * colspan=2|


 * colspan="2" |
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