| Date | Age | Event | Bishop | Title | Current Title |
| Sep | 49.5 | Resigned | Antonio María Michelato Danese, O.S.M. † | Vicar Apostolic of Aysén, Chile | Vicar Apostolic Emeritus |
| 1 Sep | 75.4 | Died | Joaquín Garcia Benitez, C.I.M. † | Archbishop Emeritus of Medellín, Colombia |
| 55.0 | Appointed | Louis Marie Henri Mazerat † | Coadjutor Bishop of Fréjus-Toulon, France | Bishop Emeritus of Angers, France |
| 55.0 | Appointed | Louis Marie Henri Mazerat † | Titular Bishop of Etenna | Bishop Emeritus of Angers, France |
| 2 Sep |
| Born | Selim Jean Sfeir | | Archbishop of Cyprus (Maronite) |
|
| Born | Yousaf Sohan | | Bishop of Multan, Pakistan |
| 3 Sep | 21.0 | Solemn Vows | Ramón López Carrozas, O. de M. † | Member of Order of Our Lady of Mercy | Bishop Emeritus of Bom Jesus do Gurguéia, Piaui, Brazil |
| 7 Sep | 24.4 | Ordained Priest | José Gustavo Angel Ramírez, M.X.Y. † | Priest of Misioneros Javerianos de Yarumal | Vicar Apostolic Emeritus of Mitú, Colombia |
| 26.7 | Ordained Priest | Alexander Soetandio Djajasiswaja † | Priest | Bishop of Bandung, Indonesia |
|
| Born | Gabriel Blamo Snosio Jubwe | | Archbishop of Monrovia, Liberia |
| 43.0 | Ordained Bishop | Pedro Reginaldo Lira † | Titular Bishop of Tenedus | Bishop Emeritus of San Francisco, Argentina |
| 48.6 | Ordained Bishop | Wilhelm Pluta † | Titular Bishop of Leptis Magna | Bishop of Gorzów, Poland |
|
| Born | Stanislav (Stane) Zore, O.F.M. | | Archbishop of Ljubljana, Slovenia |
| 8 Sep |
| Born | César Alcides Balbín Tamayo | | Bishop of Cartago, Colombia |
| 41.9 | Ordained Bishop | Enrico Bartoletti † | Titular Bishop of Myndus | Archbishop Emeritus of Lucca, Italy |
| 63.5 | Died | Artur Michael Landgraf † | Auxiliary Bishop of Bamberg, Germany |
| 46.6 | Appointed | Henry Systermans, SS.CC. † | Superior General of Congregation of the Sacred Hearts of Jesus and Mary | Superior General Emeritus |
| 9 Sep | 47.4 | Appointed | Paul John Hallinan † | Bishop of Charleston, South Carolina, USA | Archbishop of Atlanta, Georgia, USA |
| 60.7 | Ordained Bishop | Salvador Martinez Aguirre, S.J. † | Titular Bishop of Arca in Armenia | Vicar Apostolic Emeritus of Tarahumara, Chihuahua, México |
| 45.2 | Ordained Bishop | Joannes Antonius Eduardus van Dodewaard † | Titular Bishop of Clysma | Bishop of Haarlem, Netherlands |
| 12 Sep | 16.9 | Professed | Lucio Angelo Renna, O. Carm. | Member of Order of Our Lady of Mt. Carmel | Bishop Emeritus of San Severo, Italy |
| 41.9 | Appointed | Héctor Enrique Santos Hernández, S.D.B. † | Bishop of Santa Rosa de Copán, Honduras | Archbishop Emeritus of Tegucigalpa, Honduras |
| 13 Sep | 54.5 | Appointed | João Pereira Venâncio, O.R.C. † | Bishop of Leiria, Portugal | Bishop Emeritus |
| 14 Sep | 50.2 | Ordained Bishop | Adolfo Luís Bossi, O.F.M. Cap. † | Titular Bishop of Parnassus | Prelate Emeritus of São José do Grajaú, Brazil |
| 62.0 | Ordained Bishop | Edoardo Piana Agostinetti † | Titular Bishop of Euroea in Phoenicia | Auxiliary Bishop of Novara, Italy |
| 44.4 | Ordained Bishop | Ugo Poletti † | Titular Bishop of Medeli | Cardinal, Vicar General Emeritus of Roma {Rome}, Italy |
| 40.8 | Ordained Bishop | Antonio José Ramírez Salaverría † | Bishop of Maturín, Venezuela | Bishop Emeritus |
| 15 Sep | 26.9 | Ordained Priest | Hubert Constant, O.M.I. † | Priest of Oblates of Mary Immaculate | Archbishop Emeritus of Cap-Haïtien, Haïti |
| 16 Sep | 60.5 | Ordained Bishop | James Vincent Pardy, M.M. † | Titular Bishop of Irenopolis in Isauria | Bishop Emeritus of Cheongju {Ch’ongju}, Korea (South) |
| 17 Sep | 21.9 | Professed | John Magee, S.P.S. | Member of St. Patrick’s Society for the Foreign Missions | Bishop Emeritus of Cloyne, Ireland |
|
| Born | Michael Gerard Woost | | Auxiliary Bishop of Cleveland, Ohio, USA |
| 19 Sep | 55.5 | Appointed | Albert Gregory Meyer † | Cardinal, Archbishop of Chicago, Illinois, USA |
| 51.8 | Installed | Hermann Josef Schäufele † | Archbishop of Freiburg im Breisgau, Germany |
| 20 Sep | 25.4 | Ordained Priest | Elmer Osmar Ramón Miani † | Priest of Córdoba, Argentina | Bishop Emeritus of Catamarca, Argentina |
|
| Born | Fortunato Morrone | | Archbishop of Reggio Calabria-Bova, Italy |
| 54.2 | Appointed | Umberto Mozzoni † | Apostolic Nuncio to Argentina | Cardinal, President of the Roman Curia - Other |
| 22.8 | Ordained Priest | Pio Vittorio Vigo † | Priest | Bishop Emeritus of Acireale, Italy |
| 21 Sep | 23.9 | Ordained Priest | Gustavo Rodolfo Mendoza Hernández | Priest of Guatemala | Auxiliary Bishop Emeritus of Santiago de Guatemala |
| 64.3 | Ordained Bishop | Edouard Ranaivo † | Bishop of Miarinarivo, Madagascar |
| 22 Sep | 18.4 | Simple Vows | José Luís Azcona Hermoso, O.A.R. † | Member of Order of Augustinian Recollects | Prelate Emeritus of Marajó, Para, Brazil |
|
| Born | Fernando Isern | | Bishop Emeritus of Pueblo, Colorado, USA |
|
| Born | Joseph Nguyễn Tấn Tước | | Bishop of Phú Cường, Viet Nam |
|
| Born | René Osvaldo Rebolledo Salinas | | Archbishop of La Serena, Chile |
| 23 Sep | 43.4 | Succeeded | Manuel António Pires † | Bishop of Silva Porto, Angola | Bishop Emeritus of Kwito-Bié, Angola |
| 24 Sep | 56.9 | Ordained Bishop | Michael William Hyle † | Titular Bishop of Christopolis | Bishop of Wilmington, Delaware, USA |
| 72.0 | Appointed | Bernardo Regno, O.S.B. † | Titular Bishop of Bagai | Bishop Emeritus of Kandy, Sri Lanka |
| 72.0 | Resigned | Bernardo Regno, O.S.B. † | Bishop of Kandy, Sri Lanka | Bishop Emeritus |
| 23.5 | Solemn Vows | Luis Abilio Sebastiani Aguirre, S.M. † | Member of Society of Mary | Archbishop Emeritus of Ayacucho o Huamanga, Peru |
| 74.4 | Died | Julio Caicedo Téllez, S.D.B. † | Bishop of Cali, Colombia |
| 25 Sep |
| Born | Jan Vokál | | Bishop of Hradec Králové, Czechia |
| 26 Sep | 79.5 | Died | Rafael Lira Infante † | Bishop of Valparaíso, Chile |
| 28 Sep |
| Born | Julio César Corniel Amaro | | Bishop of Puerto Plata, Dominican Republic |
| 38.3 | Ordained Bishop | St. Karol Józef Wojtyła † | Titular Bishop of Ombi | Pope (Roma {Rome}, Italy) |
| 29 Sep |
| Born | Jacy Diniz Rocha | | Bishop of São Luíz de Cáceres, Mato Grosso, Brazil |
|
| Born | Ferenc Fazekaš | | Bishop of Subotica, Serbia |
|
| Born | Callistus Chukwuma Valentine Onaga | | Bishop of Enugu, Nigeria |
| 55.3 | Ordained Bishop | Wilhelm Tuschen † | Titular Bishop of Antipyrgos | Auxiliary Bishop of Paderborn, Germany |
| 30 Sep |
| Born | Jaime Muñoz Pedroza | | Bishop of Girardot, Colombia |
| 60.8 | Installed | John Joyce Russell † | Bishop of Richmond, Virginia, USA | Bishop Emeritus |
| 1 Oct | 81.9 | Died | Antonijs Springovičs † | Archbishop of Riga, Latvia |
| 66.4 | Appointed | Pēteris Strods † | Apostolic Administrator of Riga, Latvia |
| 2 Oct | 79.6 | Appointed | Johannes Baptist Dietz † | Titular Archbishop of Cotrada | Bishop Emeritus of Fulda, Germany |
| 79.6 | Retired | Johannes Baptist Dietz † | Bishop of Fulda, Germany | Bishop Emeritus |
|
| Born | Jayakody Aratchige Don Anton Jayakody | | Auxiliary Bishop of Colombo, Sri Lanka |
| 3 Oct |
| Born | Saverio Antonio Gennaro Cannistrà, O.C.D. | | Archbishop of Pisa, Italy |
| 4 Oct | 18.1 | Temporary Vows | Franco Cuter, O.F.M. Cap. † | Member of Order of Friars Minor Capuchin | Bishop Emeritus of Grajaú, Maranhão, Brazil |
| 23.0 | Perpetual Vows | Velasio De Paolis, C.S. † | Member of Congregation of the Missionaries of Saint Charles Borromeo | Cardinal, President Emeritus of the Prefecture for the Economic Affairs of the Holy See |
| 19.2 | Temporary Vows | Serafino Faustino Spreafico, O.F.M. Cap. | Member of Order of Friars Minor Capuchin | Bishop Emeritus of Grajaú, Maranhão, Brazil |
| 5 Oct | 53.1 | Ordained Bishop | Michał Blecharczyk † | Titular Bishop of Ios | Auxiliary Bishop of Tarnów, Poland |
| 33.1 | Ordained Deacon | Jean-Pierre-Dominique Zévaco, C.M. † | Deacon of Congregation of the Mission | Bishop Emeritus of Tôlagnaro, Madagascar |
| 6 Oct |
| Born | Giovanni Crippa, I.M.C. | | Bishop of Ilhéus, Bahia, Brazil |
|
| Born | Jeffrey Robert Haines | | Auxiliary Bishop of Milwaukee, Wisconsin, USA |
| 7 Oct | 53.6 | Installed | Coleman Francis Carroll † | Bishop of Miami, Florida, USA | Archbishop of Miami, Florida, USA |
|
| Born | Isaac Jogues Agbémenya Kodjo Gaglo | | Bishop of Aného, Togo |
| 28.2 | Incardinated | Pierre Jacques Joatton, Ist. del Prado † | Priest of Association of Priests of Prado | Bishop Emeritus of Saint-Etienne, France |
| 8 Oct | 45.1 | Ordained Bishop | Francis Joseph McSorley, O.M.I. † | Titular Bishop of Sozusa in Palaestina | Vicar Apostolic of Jolo, Philippines |
|
| Born | Patrick Michael O’Regan | | Archbishop of Adelaide, Australia |
| 9 Oct | 79.2 | Appointed | Benedetto Aloisi Masella † | Cardinal, Chamberlain (Camerlengo) of the Apostolic Chamber |
| 49.7 | Ordained Bishop | [ Chen Du-qing] † | Bishop of Ganzhou [Kanchow], China |
| Ordained Bishop | [ Huang Shu] † | Bishop of Yujiang [Yükiang], China |
| Ordained Bishop | [ Hu Qin-ming] † | Bishop of Nancheng [Nancheng], China |
| 82.6 | Died | Eugenio Maria Giuseppe Giovanni Pacelli † | Pope (Roma {Rome}, Italy) |
|
| Born | Manuel Eugenio Salazar Mora | | Bishop of Tilarán-Liberia, Costa Rica |
| 10 Oct | 27.8 | Ordained Priest | Karl Heinrich Braun | Priest of Augsburg, Germany | Archbishop Emeritus of Bamberg, Germany |
| 11 Oct | 53.9 | Ordained Bishop | Nicolas Kinsch, S.C.I. † | Titular Bishop of Mastaura in Asia | Archbishop Emeritus of Kisangani, Congo (Dem. Rep.) |
| 12 Oct |
| Born | Roberto Carboni, O.F.M. Conv. | | Archbishop of Oristano, Italy |
| 79.9 | Died | Settimio Peroni † | Bishop Emeritus of Norcia, Italy |
| 13 Oct | 17.6 | Temporary Vows | Sylvester Carmel Magro, O.F.M. † | Member of Order of Friars Minor | Vicar Apostolic Emeritus of Benghazi, Libya |
| 59.4 | Died | Patrick Usher, S.S.C.M.E. † | Prefect of Bhamo, Myanmar |
| 14 Oct |
| Born | Alfred Xuereb | | Apostolic Nuncio to Morocco |
| 16 Oct |
| Born | Zygmunt Robaszkiewicz, M.S.F. | | Bishop of Mahajanga, Madagascar |
| 17 Oct | 82.5 | Died | Celso Benigno Luigi Costantini † | Cardinal, Chancellor of the Apostolic Chancery |
| 18 Oct | 72.7 | Died | Giuseppe Della Cioppa † | Bishop Emeritus of Alife, Italy |
| Born | Luis Horacio Gómez González † | | Vicar Apostolic Emeritus of Puerto Gaitán, Colombia |
| 19 Oct | 24.2 | Ordained Priest | Raniero Cantalamessa, O.F.M. Cap. | Priest of Order of Friars Minor Capuchin | Cardinal, Preacher Emeritus of the Prefecture of the Papal Household |
|
| Born | Thomas Koorilos Chakkalapadickal | | Archbishop of Tiruvalla (Syro-Malankara), India |
|
| Born | Dulcênio Fontes de Matos | | Bishop of Campina Grande, Paraiba, Brazil |
| 44.4 | Ordained Bishop | Ivan Prasko † | Titular Bishop of Zygris | Bishop Emeritus of Saints Peter and Paul of Melbourne (Ukrainian), Australia |
| 50.9 | Ordained Bishop | José Rafael Pulido Méndez † | Bishop of Maracaibo, Venezuela | Archbishop of Mérida, Venezuela |
| 21 Oct |
| Born | Eugene Martin Nugent | | Apostolic Nuncio to Kuwait |
| 22 Oct |
| Born | Paolo Martinelli, O.F.M. Cap. | | Vicar Apostolic of Southern Arabia, United Arab Emirates |
| 23 Oct | | Selected | [Tarcisius Guo Ze-qian] † | Bishop of Hengyang [Hengchow], China |
| 39.7 | Selected | [James Li Shu-ren], O.S.A. † | Bishop of Yueyang [Yochow], China |
| Selected | [Louis Li Zhen-lin] † | Bishop of Lingling [Yungchow], China |
|
| Born | Robert Muhiirwa | | Bishop of Fort Portal, Uganda |
| Selected | [ Xiong De-lian (Hieng Teh-hen, Hiong Te Lien)] † | Archbishop of Changsha [Changsha], China |
| 45.0 | Selected | [Michael Yang Gao-jian], O.S.A. † | Bishop of Changde [Changteh], China |
| 24 Oct | 24.3 | Ordained Priest | Enrique Sarmiento Angulo | Priest of Bogotá, Colombia | Bishop Emeritus of Fontibón, Colombia |
| 25 Oct | 76.4 | Died | Edward Aloysius Mooney † | Cardinal, Archbishop of Detroit, Michigan, USA |
| 26 Oct | 25.3 | Ordained Priest | Abelardo Alvarado Alcántara † | Priest | Auxiliary Bishop Emeritus of México, Federal District |
| 38.6 | Ordained Bishop | José Germán Benavides Morriberón † | Bishop of Chachapoyas, Peru | Bishop Emeritus |
| 31.8 | Ordained Priest | Émile Biayenda † | Priest of Brazzaville, Congo | Cardinal, Archbishop |
| 24.5 | Ordained Priest | Mario Joseph Conti † | Priest of Aberdeen, Scotland, Great Britain | Archbishop Emeritus of Glasgow, Scotland, Great Britain |
| 25.6 | Ordained Priest | Ricardo Guízar Díaz † | Priest of Puebla de los Ángeles, México | Archbishop Emeritus of Tlalnepantla, México, México |
| Ordained Bishop | [Tarcisius Guo Ze-qian] † | Bishop of Hengyang [Hengchow], China |
| 39.7 | Ordained Bishop | [James Li Shu-ren], O.S.A. † | Bishop of Yueyang [Yochow], China |
| Ordained Bishop | [Louis Li Zhen-lin] † | Bishop of Lingling [Yungchow], China |
| 41.0 | Ordained Priest | Jorge Martínez Martínez † | Priest of México, Federal District | Auxiliary Bishop |
| 25.0 | Ordained Priest | Florencio Olvera Ochoa † | Priest of Querétaro, México | Bishop Emeritus of Cuernavaca, Morelos, México |
| 26.3 | Ordained Priest | Ramón Ovidio Pérez Morales | Priest of Caracas, Santiago de Venezuela | Bishop Emeritus of Los Teques, Venezuela |
| Ordained Bishop | [ Xiong De-lian (Hieng Teh-hen, Hiong Te Lien)] † | Archbishop of Changsha [Changsha], China |
| 45.0 | Ordained Bishop | [Michael Yang Gao-jian], O.S.A. † | Bishop of Changde [Changteh], China |
| 28 Oct | 29.2 | Ordained Priest | Teodoro Luis Arroyo Robelly, S.D.B. † | Priest of Salesians of Saint John Bosco | Vicar Apostolic Emeritus of Méndez, Ecuador |
| 42.5 | Ordained Bishop | Antonio Corso † | Titular Bishop of Moglaena | Bishop of Maldonado-Punta del Este, Uruguay |
| 47.5 | Ordained Bishop | Paul John Hallinan † | Bishop of Charleston, South Carolina, USA | Archbishop of Atlanta, Georgia, USA |
| 76.9 | Elected | St. Angelo Giuseppe Roncalli † | Pope (Roma {Rome}, Italy) |
| 29 Oct | 70.6 | Appointed | Domenico Tardini † | Pro-Secretary of the Secretariat of State | Cardinal, Secretary |
| 30 Oct |
| Born | François Michel Pierre Kalist | | Archbishop of Clermont, France |
| 31 Oct |
| Born | Joseph Edward Strickland | | Bishop Emeritus of Tyler, Texas, USA |