| Living Prelates (Total 5286) *
|
  Cardinal Renato Raffaele Martino (80), Cardinal-Deacon of S. Francesco di Paola ai Monti, President emeritus of Pontifical Council for Justice and Peace |
  Archbishop Alfred Adewale Martins (53), Metropolitan Archbishop of Lagos (Nigeria) |
  Archbishop José Martins da Silva, S.D.N. (77), Metropolitan Archbishop emeritus of Porto Velho (Brazil) |
  Bishop José Augusto Martins Fernandes Pedreira (78), Bishop emeritus of Viana do Castelo (Portugal) |
 Bishop João Evangelista Martins Terra, S.J. (88), Titular Bishop of Bagis, Auxiliary Bishop emeritus of Brasília (Brazil) |
 Bishop Raul José Quimpo Martirez (75), Bishop emeritus of San Jose de Antique (Philippines) |
  Bishop Marcelo Raúl Martorell (68), Bishop of Puerto Iguazú (Argentina) |
 Archbishop Jan Martyniak (73), Metropolitan Archbishop of Przemyśl–Warszawa of the Ukrainians (Poland) |
 Bishop Fabián Marulanda López (79), Bishop emeritus of Florencia (Colombia) |
 Bishop Paul John Marx, M.S.C. (78), Bishop emeritus of Kerema (Papua New Guinea) |
  Cardinal Reinhard Marx (59), Cardinal-Priest of S. Corbiniano, Metropolitan Archbishop of München und Freising (Germany), President of Council of European Bishops’ Conferences |
 Bishop Peter Marzinkowski, C.S.Sp. (74), Bishop of Alindao (Central African Republic) |
  Bishop Victor Emilio Masalles Pere (51), Titular Bishop of Girba, Auxiliary Bishop of Santo Domingo (Dominican Republic) |
 Bishop Ignatius Loyola Mascarenhas (63), Bishop of Simla and Chandigargh (India) |
| Bishop Paulo Antonino Mascarenhas Roxo, O. Praem. (84), Bishop emeritus of Mogi das Cruzes (Brazil) |
| Bishop Angelo Mascheroni (83), Titular Bishop of Foro Flaminio, Auxiliary Bishop emeritus of Milano (Italy) |
 Bishop Valentin Masengo Nkinda (72), Bishop of Kabinda (Congo-Kinshasa) |
| Bishop Fernando Mason, O.F.M. Conv. (68), Bishop of Piracicaba (Brazil) |
 Archbishop Angelo Massafra, O.F.M. (64), Metropolitan Archbishop of Shkodrë–Pult (Albania), President of Episcopal Conference of Albania |
 Bishop Isaac Amani Massawe (61), Bishop of Moshi (Tanzania) |
 Bishop Vital Massé (76), Bishop emeritus of Mont-Laurier (Canada) |
| Archbishop Enrico Masseroni (74), Metropolitan Archbishop of Vercelli (Italy) |
 Bishop Massoud Massoud (73), Bishop emeritus of Lattaquié of the Maronites (Syria) |
 Bishop Juan Abelardo Mata Guevara, S.D.B. (66), Bishop of Estelí (Nicaragua) |
 Archbishop Petero Mataca (80), Metropolitan Archbishop emeritus of Suva (Fiji) |
 Archbishop Alapati Lui Mataeliga (60), Metropolitan Archbishop of Samoa–Apia (Samoa) |
 Bishop Salvatore Ronald Matano (66), Bishop of Burlington (United States) |
 Archbishop Paul Youssef Matar (72), Archbishop of Beirut of the Maronites (Lebanon) |
| Bishop Giuseppe Matarrese (78), Bishop emeritus of Frascati (Italy) |
 Bishop Woldeghiorghis Mathewos (71), Vicar Apostolic of Hosanna (Ethiopia), Titular Bishop of Turuda |
| Archbishop Alphonsus Mathias (84), Metropolitan Archbishop emeritus of Bangalore (India) |
| Bishop Gerald John Mathias (59), Bishop of Lucknow (India) |
 Bishop Jean-Paul Mathieu (72), Bishop of Saint-Dié (France) |
| Bishop Édouard Mathos (64), Bishop of Bambari (Central African Republic), President of Central African Episcopal Conference |
 Bishop Juan Matogo Oyana, C.M.F. (63), Bishop of Bata (Equatorial Guinea) |
 Archbishop Athanase Matti Shaba Matoka (82), Archbishop emeritus of Baghdad of the Syrians (Iraq) |
 Bishop Michael Gorō Matsuura (ミカエル松浦悟郎) (60), Titular Bishop of Sfasferia, Auxiliary Bishop of Osaka 大阪 (Japan) |
| Bishop Abraham D. Mattam, C.V. (90), Bishop emeritus of Satna of the Syro-Malabars (India) |
| Bishop Spiridon Mattar (92), Bishop emeritus of Nossa Senhora do Paraíso em São Paulo of the Greek-Melkites (Brazil) |
 Bishop Luc Julian Matthys (77), Bishop emeritus of Armidale (Australia) |
| Archbishop Antonio Mattiazzo (73), Archbishop-Bishop of Padova (Italy) |
 Bishop Juozas Matulaitis-Labukas (75), Bishop emeritus of Kaišiadorys (Lithuania) |
| Archbishop Mario Luis Bautista Maulión (78), Metropolitan Archbishop emeritus of Paraná (Argentina) |
| Bishop François Paul Marie Maupu (73), Bishop of Verdun (France) |
 Bishop Tomás Andrés Mauro Muldoon, O.F.M. (74), Bishop emeritus of Juticalpa (Honduras) |
 Archbishop Miguel Maury Buendía (57), Titular Archbishop of Italica, Apostolic Nuncio to Kazakhstan, Apostolic Nuncio to Kyrgyzstan, Apostolic Nuncio to Tajikistan |
| Bishop André Mayamba Mabuti Kathongo (82), Bishop emeritus of Popokabaka (Congo-Kinshasa) |
 Bishop Mihály Mayer (72), Bishop emeritus of Pécs (Hungary) |
| Bishop Renato Pine Mayugba (57), Bishop of Laoag (Philippines) |
| Bishop Samir Mazloum (78), Titular Bishop of Callinicum of the Maronites, Bishop of Curia emeritus of the Maronites |
 Cardinal Medardo Joseph Mazombwe (81), Cardinal-Priest of S. Emerenziana a Tor Fiorenza, Metropolitan Archbishop emeritus of Lusaka (Zambia) |
| Bishop José Mazuelos Pérez (52), Bishop of Jerez de la Frontera (Spain) |
| Bishop Jerzy Mazur, S.V.D. (59), Bishop of Ełk (Poland) |
| Bishop Meron Mazur, O.S.B.M. (51), Titular Bishop of Simitthu, Auxiliary Bishop of São João Batista em Curitiba of the Ukrainians (Brazil) |
| Bishop Carlo Mazza (71), Bishop of Fidenza (Italy) |
| Archbishop Andrea Bruno Mazzocato (64), Metropolitan Archbishop of Udine (Italy) |
| Bishop Rosario Mazzola (88), Bishop emeritus of Cefalù (Italy) |
| Bishop Joachim Mbadu Kikhela Kupika (81), Titular Bishop of Belesasa, Bishop emeritus of Boma (Congo-Kinshasa) |
 Bishop Jean Mbarga (56), Bishop of Ebolowa (Cameroon) |
 Bishop Joseph Mbatia (51), Bishop of Nyahururu (Kenya) |
| Bishop Julien Andavo Mbia (62), Bishop of Isiro–Niangara (Congo-Kinshasa) |
 Archbishop Gabriel Mbilingi, C.S.Sp. (55), Metropolitan Archbishop of Lubango (Angola), President of Episcopal Conference of Angola and São Tomé |
 Bishop Smaragde Mbonyintege (66), Bishop of Kabgayi (Rwanda), President of Episcopal Conference of Rwanda |
| Bishop Cyprien Mbuka Nkuanga, C.I.C.M. (69), Bishop of Boma (Congo-Kinshasa) |
| Bishop Louis Mbwôl-Mpasi, O.M.I. (82), Bishop emeritus of Idiofa (Congo-Kinshasa) |
 Bishop John McAreavey (64), Bishop of Dromore (United Kingdom) |
| Cardinal Theodore Edgar McCarrick (82), Cardinal-Priest of Ss. Nereo ed Achilleo, Metropolitan Archbishop emeritus of Washington (United States) |
| Bishop James Francis McCarthy (70), Titular Bishop of Verrona, Auxiliary Bishop emeritus of New York (United States) |
| Bishop John Edward McCarthy (82), Bishop emeritus of Austin (United States) |
| Bishop Patrick Leo McCartie (87), Bishop emeritus of Northampton (United Kingdom) |
| Bishop John Brendan McCormack (77), Bishop emeritus of Manchester (United States) |
| Bishop William Jerome McCormack (89), Titular Bishop of Nicives, Auxiliary Bishop emeritus of New York (United States) |
| Bishop Andrew Joseph McDonald (89), Bishop emeritus of Little Rock (United States) |
| Archbishop Kevin John Patrick McDonald (65), Metropolitan Archbishop emeritus of Southwark (United Kingdom) |
| Bishop Charles James McDonnell (84), Titular Bishop of Pocofeltus, Auxiliary Bishop emeritus of Newark (United States) |
| Bishop Timothy Anthony McDonnell (75), Bishop of Springfield in Massachusetts (United States) |
| Bishop Robert Walter McElroy (59), Titular Bishop of Gemellæ in Byzacena, Auxiliary Bishop of San Francisco (United States) |
| Bishop Joseph Patrick McFadden (65), Bishop of Harrisburg (United States) |
| Bishop David Christopher McGough (68), Titular Bishop of Chunavia, Auxiliary Bishop of Birmingham (United Kingdom) |
| Bishop Patrick Joseph McGrath (67), Bishop of San Jose (United States) |
| Bishop William Terrence McGrattan (56), Titular Bishop of Furnos minor, Auxiliary Bishop of Toronto (Canada) |
| Bishop Robert McGuckin (69), Bishop of Toowoomba (Australia) |
| Bishop John J. McIntyre (49), Titular Bishop of Bononia, Auxiliary Bishop of Philadelphia (United States) |
| Bishop Michael Joseph McKenna (61), Bishop of Bathurst (Australia) |
| Bishop Myles McKeon (94), Bishop emeritus of Bunbury (Australia) |
| Bishop Donal McKeown (63), Titular Bishop of Cell Ausaille, Auxiliary Bishop of Down and Connor (United Kingdom) |
| Bishop Bernard Joseph McLaughlin (100), Titular Bishop of Mottola, Auxiliary Bishop emeritus of Buffalo (United States) |
| Bishop Malcolm Patrick McMahon, O.P. (63), Bishop of Nottingham (United Kingdom) |
| Bishop Thomas McMahon (76), Bishop of Brentwood (United Kingdom) |
| Bishop Robert Joseph McManus (61), Bishop of Worcester (United States) |
 Bishop Juan Conway McNabb, O.S.A. (87), Bishop emeritus of Chulucanas (Peru) |
 Bishop William John McNaughton, M.M. (나길모 굴리엘모) (86), Bishop emeritus of Incheon 인천 (South Korea) |
  Fr. Michael Bernard McPartland, S.M.A. (73), Prefect Apostolic of Falkland Islands (Falkland Islands), Ecclesiastical Superior of Saint Helena, Ascension and Tristan da Cunha (Saint Helena, Ascension and Tristan da Cunha) |
 Bishop Burchell Alexander McPherson (61), Bishop of Montego Bay (Jamaica) |
| Bishop John Jeremiah McRaith (78), Bishop emeritus of Owensboro (United States) |
| Bishop Titus Joseph Mdoe (52), Titular Bishop of Bahanna, Auxiliary Bishop of Dar-es-Salaam (Tanzania) |
| Abbot Mauro Meacci, O.S.B. (57), Abbot Ordinary of Subiaco (Italy) |
 Archbishop José Trinidad Medel Pérez (84), Metropolitan Archbishop emeritus of Durango (Mexico) |
| Bishop Tesfay Medhin (60), Bishop of Adigrat of the Ethiopics (Ethiopia) |
 Cardinal Jorge Arturo Medina Estévez (86), Cardinal-Priest of S. Saba pro hac vice Title, Bishop emeritus of Valparaíso (Chile), Protodeacon emeritus of College of Cardinals |
