Roman Catholic Diocese of Mar del Plata

The Roman Catholic Diocese of Mar del Plata (Dioecesis Maris Platensis) is in Argentina and is a suffragan of the Archdiocese of La Plata.

History
On 11 February 1957, Pope Pius XII established the Diocese of Mar del Plata from the Diocese of Bahía Blanca and the Archdiocese of La Plata. Territory was taken from the diocese in 1980 to form the Diocese of Chascomús.

Ordinaries

 * Enrique Rau (1957–1971)
 * Eduardo Francisco Pironio (1972–1975), appointed titular Archbishop and Pro-Prefect of the Congregation for Religious and Secular Institutes (Cardinal in 1976)
 * Rómulo García (1976–1991), appointed Archbishop of Bahía Blanca
 * José María Arancedo (1991–2003), appointed Archbishop of Santa Fe de la Vera Cruz
 * Juan Alberto Puiggari (2003–2010), appointed Archbishop of Paraná
 * Antonio Marino (2011-2017)
 * Gabriel Mestre (2017-2023), appointed Archbishop of La Plata
 * José María Baliña (2023-2023), resigned due health reasons, not possessed
 * Gustavo Manuel Larrazábal, C.M.F. (2023-2024),resigned, not possessed, reappointed as auxiliary bishop San Juan de Cuyo and Titular bishop of Buslacena

Auxiliary bishops

 * Rómulo García (1975–1976), appointed Bishop here
 * Dario Rubén Quintana, O.A.R. (2019-)

Ministries

 * Regional Council of Catholic Education (JUREC): Prebyster Juan Cruz Menilli Caldararo (2023-26)
 * University Minister: Prebyster Lucas di Leva
 * Vocations Ministry: Gabriela Verónica Tumini (2020-23)
 * Family Ministry: Nora Cristina Pompa (2020-23)
 * Addictions Ministry: Sandra Karina Vitali (2023-26)
 * Council of Cultural Heritage: Analía Benítez