| Living Prelates (Total 5642) * |
  Bishop Edward Elias Mapunda (60), Bishop of Singida (Tanzania) |
  Bishop Mikha Pola Maqdassi (75), Titular Bishop of Seert of the Chaldeans and Auxiliary Bishop emeritus of Baghdad of the Chaldeans (Iraq) |
 Bishop Andrew Raksam Marak (74), Bishop of Tura (India) |
 Bishop Marcelino Antonio Malabanan Maralit (55), Bishop of San Pablo (Philippines) |
| Bishop Julius Marandi (70), Bishop of Dumka (India) |
 Bishop Renato Marangoni (66), Bishop of Belluno–Feltre (Italy) |
  Archbishop Boutros Marayati (76), Archbishop of Aleppo of the Armenians (Syria) |
 Bishop André Marceau (78), Bishop emeritus of Nice (France) |
 Bishop Gabriele Marchesi (71), Bishop of Floresta (Brazil) |
 Archbishop Pedro Antônio Marchetti Fedalto (98), Metropolitan Archbishop emeritus of Curitiba (Brazil) |
 Cardinal Agostino Marchetto (84), Cardinal-Deacon of S. Maria Goretti and Secretary emeritus of Pontifical Council for the Pastoral Care of Migrants and Itinerant People |
| Bishop Bernardino Marchió (81), Bishop emeritus of Caruaru (Brazil) |
| Bishop Celso Antônio Marchiori (66), Bishop of São José dos Pinhais (Brazil) |
| Bishop Mosè Marcia (81), Bishop emeritus of Nuoro (Italy) |
| Archbishop Santo Marcianò (64), Archbishop Military Ordinary of Italy (Italy) |
| Bishop Giuseppe Marciante (73), Bishop of Cefalù (Italy) |
  Bishop Roman Adam Marcinkowski (82), Titular Bishop of Bulla regia and Auxiliary Bishop emeritus of Płock (Poland) |
 Bishop Dominic Anthony Marconi (97), Titular Bishop of Bure and Auxiliary Bishop emeritus of Newark (USA) |
| Bishop Nazzareno Marconi (66), Bishop of Macerata (Italy) |
| Archbishop Émile Marcus, P.S.S. (94), Metropolitan Archbishop emeritus of Toulouse (France) |
 Bishop Giacinto-Boulos Marcuzzo (79), Titular Bishop of Emmaüs and Auxiliary Bishop emeritus of Jerusalem (Palestine) |
 Bishop Marek Grzegorz Marczak (55), Titular Bishop of Lentini, Auxiliary Bishop of Łódź (Poland) and General Secretary of Episcopal Conference of Poland |
  Cardinal Giorgio Marengo, I.M.C. (50), Cardinal-Priest of S. Giuda Taddeo Apostolo and Prefect Apostolic of Ulaanbaatar (Mongolia) |
 Archbishop Gyula Márfi (81), Metropolitan Archbishop emeritus of Veszprém (Hungary) |
 Bishop Marcelo Julián Margni (53), Bishop of Avellaneda–Lanús (Argentina) |
 Bishop Luis Marín de San Martín, O.S.A. (63), Titular Bishop of Suliana and Undersecretary of General Secretariat of the Synod |
 Archbishop Iván Antonio Marín López (86), Metropolitan Archbishop emeritus of Popayán (Colombia) |
| Bishop Guido Marini (59), Bishop of Tortona (Italy) |
 Archbishop Piero Marini (82), Titular Archbishop of Martirano and President emeritus of Pontifical Committee for International Eucharistic Congresses |
| Bishop Antonio Marino (82), Bishop emeritus of Mar del Plata (Argentina) |
| Bishop Calogero Marino (69), Bishop of Savona–Noli (Italy) |
| Bishop Francesco Marino (69), Bishop of Nola (Italy) |
| Archbishop Joseph Salvador Marino (71), Titular Archbishop of Natchitoches and President emeritus of Pontifical Ecclesiastical Academy |
 Bishop Josef Marketz (69), Bishop of Gurk (Austria) |
| Bishop Rafał Markowski (66), Titular Bishop of Obba and Auxiliary Bishop of Warszawa (Poland) |
 Archbishop François-Xavier Maroy Rusengo (68), Metropolitan Archbishop of Bukavu (Congo-Kinshasa) |
 Bishop Estanislau Marques Chindekasse, S.V.D. (66), Bishop of Dundo (Angola) and Vice-President of Episcopal Conference of Angola and São Tomé |
| Bishop Emilio Zurbano Marquez (83), Bishop emeritus of Lucena (Philippines) |
| Bishop Mário Marquez, O.F.M. Cap. (72), Bishop of Joaçaba (Brazil) |
 Bishop Carlos Eduardo Márquez Delima (63), Titular Bishop of Cefala and Auxiliary Bishop of Caracas (Venezuela) |
| Bishop Luis Alfonso Márquez Molina, C.I.M. (88), Titular Bishop of Turris rotunda and Auxiliary Bishop emeritus of Mérida (Venezuela) |
| Bishop Robert William Marshall (65), Bishop of Alexandria (USA) |
| Bishop Philippe André Yves Marsset (67), Titular Bishop of Thibica and Auxiliary Bishop of Paris (France) |
 Archbishop Diarmuid Martin (79), Metropolitan Archbishop emeritus of Dublin (Ireland) |
 Archbishop Eamon Martin (63), Metropolitan Archbishop of Armagh (Northern Ireland), President of Irish Catholic Bishops’ Conference and Apostolic Administrator of Dromore (Northern Ireland) |
| Archbishop Eduardo Eliseo Martín (71), Metropolitan Archbishop of Rosario (Argentina) |
| Bishop Luis Dario Martín (63), Titular Bishop of Bisenzio and Auxiliary Bishop of Santa Rosa (Argentina) |
| Bishop Michael Thomas Martin, O.F.M. Conv. (63), Bishop of Charlotte (USA) |
 Archbishop Paul Gerard Martin, S.M. (57), Metropolitan Archbishop of Wellington (New Zealand), Military Ordinary of New Zealand (New Zealand) and General Secretary of New Zealand Catholic Bishops Conference |
| Bishop Raúl Martín (67), Bishop of Santa Rosa (Argentina) |
 Bishop Juan Luis Martin Buisson, P.M.E. (90), Titular Bishop of Aquæ in Numidia and Vicar Apostolic emeritus of Pucallpa (Peru) |
| Bishop Armando Martín Gutiérrez, F.A.M. (70), Bishop of Bacabal (Brazil) |
| Bishop Vicente Martín Muñoz (55), Titular Bishop of Valliposita and Auxiliary Bishop of Madrid (Spain) |
 Archbishop José Guadalupe Martín Rábago (89), Metropolitan Archbishop emeritus of León (Mexico) |
 Bishop Paolo Martinelli, O.F.M. Cap. (66), Vicar Apostolic of Southern Arabia (United Arab Emirates) |
| Bishop Raffaello Martinelli (76), Bishop emeritus of Frascati (Italy) |
| Bishop Juan Rubén Martínez (71), Bishop of Posadas (Argentina) |
| Bishop Juan Antonio Martínez Camino, S.J. (71), Titular Bishop of Bigastro and Auxiliary Bishop of Madrid (Spain) |
| Bishop Francisco Javier Martínez Castillo (50), Titular Bishop of Nepte and Auxiliary Bishop of Puebla de los Ángeles (Mexico) |
| Bishop Isaac Circuncisión Martínez Chuquizana, M.S.A. (71), Bishop of Cajamarca (Peru) |
| Bishop David Martínez De Aguirre Guinea, O.P. (54), Vicar Apostolic of Puerto Maldonado (Peru) and Titular Bishop of Izirzada |
| Archbishop Francisco Javier Martínez Fernández (77), Metropolitan Archbishop emeritus of Granada (Spain) |
 Cardinal Adalberto Martínez Flores (73), Cardinal-Priest of S. Giovanni a Porta Latina, Metropolitan Archbishop of Asunción (Paraguay) and Apostolic Administrator of the Military Ordinariate of Paraguay (Paraguay) |
| Bishop Juan Odilón Martínez García (75), Bishop emeritus of Atlacomulco (Mexico) |
| Bishop José Carmelo Martínez Lázaro, O.A.R. (70), Bishop emeritus of Cajamarca (Peru) |
 Bishop Miguel Ángel Martínez Méndez (65), Vicar Apostolic of Izabal (Guatemala) |
| Bishop Maximino Martínez Miranda (73), Titular Bishop of Lugura and Auxiliary Bishop of Toluca (Mexico) |
| Bishop Enrique Alberto Martínez Ossola (72), Titular Bishop of Acquapendente and Auxiliary Bishop of Santiago del Estero (Argentina) |
| Bishop Raúl Antonio Martínez Paredes (81), Titular Bishop of Mizigi and Auxiliary Bishop emeritus of Santiago de Guatemala (Guatemala) |
| Bishop Pedro Daniel Martínez Perea (58), Bishop emeritus of San Luis (Argentina) |
| Bishop Nelson Antonio Martínez Rust (80), Bishop emeritus of San Felipe (Venezuela) |
| Cardinal Lluís Martínez Sistach (87), Cardinal-Priest of S. Sebastiano alle Catacombe and Metropolitan Archbishop emeritus of Barcelona (Spain) |
| Bishop Abilio Martínez Varea (60), Bishop of Osma–Soria (Spain) |
| Bishop Hency Martínez Vargas (66), Bishop of La Dorada–Guaduas (Colombia) |
| Bishop José de Jesús Martínez Zepeda (83), Bishop emeritus of Irapuato (Mexico) |
| Bishop Baldomero Carlos Martini (85), Bishop emeritus of San Justo (Argentina) |
| Bishop Joseph Francis Martino (78), Bishop emeritus of Scranton (USA) |
 Bishop Ivo Martinović, T.O.R. (59), Bishop of Požega (Croatia) |
 Archbishop Alfred Adewale Martins (65), Metropolitan Archbishop of Lagos (Nigeria) |
| Bishop Zsolt Marton (58), Bishop of Vác (Hungary) |
| Bishop Levente Balázs Martos (51), Titular Bishop of Treba and Auxiliary Bishop of Esztergom–Budapest (Hungary) |
| Archbishop Jan Martyniak (85), Metropolitan Archbishop emeritus of Przemyśl–Warszawa of the Ukrainians (Poland) |
 Archbishop Teodor Martynyuk (Taras), M.S.U. (50), Metropolitan Archbishop of Ternopil–Zboriv of the Ukrainians (Ukraine) |
| Bishop Fabián Marulanda López (91), Bishop emeritus of Florencia (Colombia) |
| Bishop Wilbert Marwein (54), Bishop of Nongstoin (India) |
 Cardinal Reinhard Marx (71), Cardinal-Priest of S. Corbiniano, Metropolitan Archbishop of München und Freising (Germany) and Coordinator of Council for the Economy |
 Bishop Victor Emilio Masalles Pere (63), Bishop emeritus of Baní (Dominican Republic) |
| Bishop Ignatius Loyola Ivan Mascarenhas (75), Bishop of Simla and Chandigarh (India) |
| Bishop Louis Mascarenhas (65), Bishop of Allahabad (India) |
| Bishop Sebastião Mascarenhas, S.F.X. (65), Bishop of Baroda (India) |
| Bishop Theodore Mascarenhas, S.F.X. (64), Bishop of Daltonganj (India) |
| Bishop Angelo Mascheroni (95), Titular Bishop of Foro Flaminio and Auxiliary Bishop emeritus of Milano (Italy) |
 Bishop Brian Mascord (65), Bishop of Wollongong (Australia) |
 Bishop Jeremiah Madimetja Masela (66), Bishop of Polokwane (South Africa) |
| Bishop Fernando Mason, O.F.M. Conv. (79), Bishop emeritus of Piracicaba (Brazil) |
 Bishop Paul James Mason (62), Military Ordinary of Great Britain (England) |
| Bishop Simon Chibuga Masondole (52), Bishop of Bunda (Tanzania) |
| Archbishop Georges Masri (56), Metropolitan Archbishop of Aleppo of the Greek-Melkites (Syria) |
| Bishop James Massa (64), Titular Bishop of Bardstown and Auxiliary Bishop of Brooklyn (USA) |
 Archbishop Angelo Massafra, O.F.M. (75), Metropolitan Archbishop of Shkodrë–Pult (Albania) |
