| Bishops (123) | Elected | Consecrated |
 Bishop Harold Robert Perry, S.V.D.former Auxiliary Bishop of New Orleans (USA) | 1965.09.29 | 1966.01.06 |
 Bishop Joseph Phạm Văn Thiênformer Bishop of Phú Cuong (Vietnam) | 1965.10.14 | 1966.01.06 |
| Bishop François-Xavier Trần Thanh Khâm former Auxiliary Bishop of Saigon (Vietnam) | 1965.10.14 | 1966.01.06 |
 Bishop Barthélemy-Pierre-Joseph Hanrion, O.F.M.former Bishop of Dapango (Togo) | 1965.07.06 | 1966.01.09 |
| Bishop Joseph Lê Văn Ấn former Bishop of Xuân Lôc (Vietnam) | 1965.10.14 | 1966.01.09 |
 Bishop Arturo Salazar Mejia, O.A.R.former Bishop of Pasto (Colombia) | 1965.10.14 | 1966.01.09 |
 Bishop Amilcare Pasiniformer Bishop of Parma (Italy) | 1965.12.31 | 1966.01.14 |
| Cardinal Salvatore Pappalardo former Cardinal-Priest of S. Maria Odigitria dei Siciliani pro hac vice Title former Metropolitan Archbishop of Palermo (Italy) | 1965.12.07 | 1966.01.16 |
 Archbishop Ismael Blas Rolón Silvero, S.D.B.former Metropolitan Archbishop of Asunción (Paraguay) | 1960.08.02 | 1966.01.23 |
| Bishop Jerome Arthur Pechillo, T.O.R. former Bishop-Prelate of Coronel Oviedo (Paraguay) former Auxiliary Bishop of Newark (USA) | 1961.09.10 | 1966.01.25 |
 Bishop José Eduardo Alvarez Ramírez, C.M.former Bishop of San Miguel (El Salvador) | 1965.10.07 | 1966.01.25 |
 Bishop James Philip Mulvihill, O.M.I.former Bishop of Whitehorse (Canada) | 1965.12.18 | 1966.01.25 |
 Archbishop Olimpo Santiago Maresmaformer Metropolitan Archbishop of Mendoza (Argentina) | 1965.09.07 | 1966.01.30 |
 Bishop Franciszek Musielformer Auxiliary Bishop of Częstochowa (Poland) | 1965.11.12 | 1966.01.30 |
 Bishop Patrick Joseph Caseyformer Bishop of Brentwood (England) | 1965.12.23 | 1966.02.02 |
 Bishop Gabino Peral de la Torre, O.S.A.former Vicar Apostolic of Iquitos (Peru) | 1965.10.14 | 1966.02.06 |
| Archbishop Ignacy Marcin Tokarczuk former Metropolitan Archbishop of Przemyśl (Poland) | 1965.12.03 | 1966.02.06 |
 Archbishop Alfred Cuthbert Gumbinger, O.F.M. Cap.former Metropolitan Archbishop of Izmir (Turkiye) | 1965.11.04 | 1966.02.09 |
| Bishop Augustine Harris former Bishop of Middlesbrough (England) | 1965.12.23 | 1966.02.11 |
| Archbishop James Francis Carney former Metropolitan Archbishop of Vancouver (Canada) | 1966.01.07 | 1966.02.11 |
 Bishop Girolamo Maria Casalini, O.S.M.former Bishop of Manzini (Eswatini) | 1965.12.18 | 1966.02.12 |
 Bishop José Ivo Lorscheiterformer Bishop of Santa Maria (Brazil) | 1965.11.12 | 1966.03.06 |
| Archbishop Luigi Maffeo former Archbishop Military Vicar of Italy (Italy) | 1966.01.16 | 1966.03.06 |
 Bishop Paul-Marie François Rousset, Pradoformer Bishop of Saint-Étienne (France) | 1966.01.24 | 1966.03.06 |
| Bishop Thomas Ambrose Tschoepe former Bishop of Dallas (USA) | 1966.01.12 | 1966.03.09 |
| Bishop José Maritano, P.I.M.E. former Bishop of Macapá (Brazil) | 1965.12.29 | 1966.03.19 |
| Archbishop Dino Trabalzini former Archbishop of Cosenza–Bisignano (Italy) | 1966.02.11 | 1966.03.19 |
| Bishop Oscar Zanera former Auxiliary Bishop of the Vicariate of Rome of Roma (Italy) | 1966.02.11 | 1966.03.19 |
| Cardinal Ferdinando Giuseppe Antonelli, O.F.M. former Cardinal-Priest of S. Sebastiano al Palatino pro hac vice Title former Secretary of Sacred Congregation for the Causes of Saints | 1966.02.19 | 1966.03.19 |
| Cardinal Giacomo Violardo former Cardinal-Deacon of S. Eustachio former Patron of Sovereign Military Hospitaller Order of Saint John of Jerusalem of Rhodes and of Malta (Knights of Malta) | 1966.02.19 | 1966.03.19 |
 Archbishop Aloys Mulindwa Mutabesha Mugoma Mweruformer Metropolitan Archbishop of Bukavu (Congo-Kinshasa) | 1965.12.18 | 1966.03.20 |
 Archbishop Gabriel Koda (Chaldean Rite)former Metropolitan Archbishop of Kirkuk of the Chaldeans (Iraq) | 1965.11.27 | 1966.03.25 |
| Archbishop Gabriel Batta (Chaldean Rite) former Archbishop of Diarbekir of the Chaldeans (Turkiye) | 1966.01.03 | 1966.03.25 |
| Bishop Charles Paty former Bishop of Luçon (France) | 1966.01.03 | 1966.03.25 |
| Archbishop Thomas Michel Bidawid (Chaldean Rite) former Archbishop of Ahvaz of the Chaldeans (Iran) former Auxiliary Bishop of Baghdad of the Chaldeans (Iraq) | 1966.01.06 | 1966.03.25 |
 Archbishop Anthony Rayappa Arulappaformer Metropolitan Archbishop of Madras and Mylapore (India) | 1966.02.01 | 1966.03.25 |
| Archbishop John Joseph Thomas Ryan former Archbishop Military Ordinary of United States of America (USA) | 1966.02.07 | 1966.03.25 |
| Archbishop Ricardo Durand Flórez, S.J. former Archbishop-Bishop of Callao (Peru) | 1966.02.14 | 1966.03.25 |
| Bishop James Edward Michaels (권야고보), S.S.C.M.E. former Auxiliary Bishop of Wheeling–Charleston (USA) | 1966.02.15 | 1966.04.14 |
 Bishop Clarence James Duhart, C.SS.R.former Bishop of Udon Thani (Thailand) | 1965.12.18 | 1966.04.21 |
| Bishop Angelo Félix Mugnol former Bishop of Bagé (Brazil) | 1966.02.07 | 1966.04.24 |
 Archbishop Samuel Emmanuel Carter, S.J.former Metropolitan Archbishop of Kingston in Jamaica (Jamaica) | 1966.02.01 | 1966.04.25 |
| Bishop Francesco Sanmartino former Auxiliary Bishop of Torino (Italy) | 1966.04.07 | 1966.04.25 |
| Cardinal Joseph Louis Bernardin former Cardinal-Priest of Gesù Divin Lavoratore former Metropolitan Archbishop of Chicago (USA) | 1966.03.04 | 1966.04.26 |
| Bishop Edward John Herrmann former Bishop of Columbus (USA) | 1966.03.04 | 1966.04.26 |
 Cardinal Peter Seiichi Shirayanagi (ペトロ 白柳誠一)former Cardinal-Priest of S. Emerenziana a Tor Fiorenza former Metropolitan Archbishop of Tokyo 東京 (Japan) | 1966.03.15 | 1966.05.08 |
 Bishop Thomas Stewart (박 토마), S.S.C.M.E.former Bishop of Chunchon 춘천 (South Korea) | 1966.02.01 | 1966.05.11 |
| Bishop Friedrich Helmel, S.V.D. former Bishop of Guarapuava (Brazil) | 1966.03.19 | 1966.05.19 |
 Bishop Roque Antonio Adames Rodríguezformer Bishop of Santiago de los Caballeros (Dominican Republic) | 1966.03.14 | 1966.05.22 |
| Bishop José Fernandes Veloso former Bishop of Petrópolis (Brazil) | 1966.03.23 | 1966.05.22 |
| Bishop Joseph Gregory Vath former Bishop of Birmingham (USA) | 1966.03.04 | 1966.05.26 |
| Bishop Justin Abraham Najmy, B.A. (Greek-Melkite Rite) former Apostolic Exarch of United States of America of the Greek-Melkites (USA) | 1966.01.27 | 1966.05.29 |
| Archbishop Bolesław Pylak former Metropolitan Archbishop of Lublin (Poland) | 1966.03.14 | 1966.05.29 |
 Bishop Domenico Ferrara, M.C.C.J.former Prefect Apostolic of Mupoi (South Sudan) | 1966.03.15 | 1966.05.29 |
| Cardinal Stephen Kim Sou-hwan (김수환 스테파노 / 金壽宦) former Cardinal-Priest of S. Felice da Cantalice a Centocelle former Metropolitan Archbishop of Seoul 서울 (South Korea) | 1966.02.15 | 1966.05.31 |
| Archbishop Peter Leo Gerety former Metropolitan Archbishop of Newark (USA) | 1966.03.04 | 1966.06.01 |
| Bishop Mário Roberto Emmett Anglim, C.SS.R. former Bishop-Prelate of Coari (Brazil) | 1964.04.24 | 1966.06.02 |
| Bishop Armand-François Le Bourgeois, C.I.M. former Bishop of Autun (France) | 1966.03.22 | 1966.06.05 |
| Bishop Adriano Jaime Miriam Veigle, T.O.R. former Bishop-Prelate of Borba (Brazil) | 1964.06.18 | 1966.06.09 |
| Cardinal Humberto Sousa Medeiros former Cardinal-Priest of S. Susanna former Metropolitan Archbishop of Boston (USA) | 1966.04.14 | 1966.06.09 |
| Archbishop Juan Antonio Flores Santana former Metropolitan Archbishop of Santiago de los Caballeros (Dominican Republic) | 1966.04.24 | 1966.06.12 |
 Bishop Jaime Brufau Maciá, C.M.former Bishop of San Pedro Sula (Honduras) | 1966.03.15 | 1966.06.29 |
| Bishop Bruno Maldaner former Bishop of Frederico Westphalen (Brazil) | 1966.04.15 | 1966.06.29 |
| Archbishop Luigi Rovigatti former Vicegerent for the Vicariate of Rome of Roma (Italy) | 1966.05.23 | 1966.06.29 |
| Cardinal Paulo Evaristo Arns, O.F.M. former Cardinal-Priest of S. Antonio da Padova in Via Tuscolana former Metropolitan Archbishop of São Paulo (Brazil) | 1966.05.02 | 1966.07.03 |
 Bishop Patrick Lennonformer Bishop of Kildare and Leighlin (Ireland) | 1966.05.14 | 1966.07.03 |
| Venerable Bishop Bernardino Maria Dino Piccinelli, O.S.M. former Auxiliary Bishop of Ancona (Italy) | 1966.06.23 | 1966.07.10 |
 Cardinal Angel Suquía Goicoecheaformer Cardinal-Priest of Gran Madre di Dio former Metropolitan Archbishop of Madrid (Spain) | 1966.05.17 | 1966.07.16 |
| Archbishop Félix María Torres Parra former Metropolitan Archbishop of Barranquilla (Colombia) | 1966.06.04 | 1966.07.24 |
| Bishop Nicholas D’Antonio Salza, O.F.M. former Bishop-Prelate of Inmaculada Concepción de la B.V.M. en Olancho (Honduras) | 1963.12.28 | 1966.07.25 |
 Bishop Ernest Bertrand Boland, O.P.former Bishop of Multan (Pakistan) | 1966.05.17 | 1966.07.25 |
| Bishop Miguel Ángel Lecumberri Erburu, O.C.D. former Vicar Apostolic of Tumaco (Colombia) | 1966.05.03 | 1966.07.31 |
| Bishop Luiz Roberto Gomes de Arruda, T.O.R. former Bishop-Prelate of Guajará-Mirim (Brazil) | 1964.04.24 | 1966.08.15 |
 Archbishop Pedro Antônio Marchetti Fedalto (99)Metropolitan Archbishop emeritus of Curitiba (Brazil) | 1966.05.30 | 1966.08.28 |
 Bishop Cirilo Polidoro van Vlierberghe, O.F.M.former Bishop-Prelate of Illapel (Chile) | 1966.06.27 | 1966.08.28 |
 Bishop Jesús Agustín López de Lama, C.P.former Bishop-Prelate of Corocoro (Bolivia) | 1966.06.10 | 1966.09.04 |
 Bishop James Timothy Kieran Cotter, O.S.A.former Bishop of Maiduguri (Nigeria) | 1966.06.07 | 1966.09.08 |
 Bishop Adolf Kindermannformer Auxiliary Bishop of Hildesheim (Germany) | 1966.07.11 | 1966.09.08 |
| Bishop John Bernard McDowell former Auxiliary Bishop of Pittsburgh (USA) | 1966.07.19 | 1966.09.08 |
 Bishop Julio Xavier Labayen, O.C.D.former Bishop-Prelate of Infanta (Philippines) | 1966.07.26 | 1966.09.08 |
 Bishop James Dominic Sanguformer Bishop of Mbeya (Tanzania) | 1966.05.03 | 1966.09.11 |
| Cardinal Giovanni Benelli former Cardinal-Priest of S. Prisca former Metropolitan Archbishop of Firenze (Italy) | 1966.06.11 | 1966.09.11 |
| Bishop Paul Francis Reding former Bishop of Hamilton (Canada) | 1966.07.02 | 1966.09.14 |
 Bishop Urban Charles Joseph Murphy, C.P.former Bishop of Gaborone (Botswana) | 1966.08.05 | 1966.09.14 |
| Archbishop Martin-Léonard Bakole wa Ilunga former Metropolitan Archbishop of Kananga (Congo-Kinshasa) | 1966.06.21 | 1966.09.18 |
 Bishop Antonio Sahagún Lópezformer Bishop of Linares (Mexico) former Auxiliary Bishop of Guadalajara (Mexico) | 1966.07.18 | 1966.09.21 |
| Bishop Vincent Madeley Harris former Bishop of Austin (USA) | 1966.07.04 | 1966.09.28 |
| Bishop Alberto Ablondi former Bishop of Livorno (Italy) | 1966.08.09 | 1966.10.01 |
| Bishop Heinrich Rüth, C.S.Sp. former Bishop of Cruzeiro do Sul (Brazil) | 1966.06.21 | 1966.10.02 |
| Archbishop Luciano José Cabral Duarte former Metropolitan Archbishop of Aracaju (Brazil) | 1966.07.14 | 1966.10.02 |
| Archbishop Michele Mincuzzi former Metropolitan Archbishop of Lecce (Italy) | 1966.07.19 | 1966.10.02 |
| Archbishop Miguel Roca Cabanellas former Metropolitan Archbishop of Valencia (Spain) | 1966.07.20 | 1966.10.02 |
 Bishop Gerardo Humberto Flores Reyesformer Bishop of Vera Paz (Guatemala) | 1966.07.26 | 1966.10.07 |
| Archbishop Emmanuel Kataliko former Metropolitan Archbishop of Bukavu (Congo-Kinshasa) | 1966.05.17 | 1966.10.11 |
 Bishop Américo Henriquesformer Bishop of Nova Lisboa (Angola) | 1966.07.03 | 1966.10.11 |
| Bishop Joseph Gustave François Wicquart former Bishop of Coutances (France) | 1966.09.02 | 1966.10.11 |
| Bishop James Louis Flaherty former Auxiliary Bishop of Richmond (USA) | 1966.08.08 | 1966.10.15 |
 Bishop Theodorus Henricus Johannes Zwartkruisformer Bishop of Haarlem (Netherlands) | 1966.08.18 | 1966.10.15 |
 Bishop Denis Martin Tapsoba, M. Afr.former Bishop of Ouahigouya (Burkina Faso) | 1966.03.15 | 1966.10.16 |
| Archbishop Manuel Pérez-Gil y González former Metropolitan Archbishop of Tlalnepantla (Mexico) | 1966.07.18 | 1966.10.18 |
 Archbishop Joseph Patrick Fitzgerald, O.M.I.former Archbishop-Bishop of Johannesburg (South Africa) | 1966.08.06 | 1966.10.18 |
 Archbishop François-Wolff Ligondéformer Metropolitan Archbishop of Port-au-Prince (Haiti) | 1966.08.20 | 1966.10.28 |
| Bishop Jean-Jacques Claudius Angénor former Bishop of Les Cayes (Haiti) | 1966.08.20 | 1966.10.28 |
| Bishop Emmanuel Constant former Bishop of Les Gonaïves (Haiti) | 1966.08.20 | 1966.10.28 |
| Bishop Jean-Baptiste Décoste former Bishop of Hinche (Haiti) | 1966.08.20 | 1966.10.28 |
| Bishop Charles-Édouard Peters, S.M.M. former Bishop of Jérémie (Haiti) | 1966.10.17 | 1966.10.28 |
 Cardinal Emmanuel Kiwanuka Nsubugaformer Cardinal-Priest of S. Maria Nuova former Metropolitan Archbishop of Kampala (Uganda) | 1966.08.05 | 1966.10.30 |
| Bishop Plinio Pascoli former Auxiliary Bishop of the Vicariate of Rome of Roma (Italy) | 1966.08.05 | 1966.10.30 |
| Bishop Gabriel Larraín Valdivieso former Auxiliary Bishop of Santiago (Chile) | 1966.09.12 | 1966.11.03 |
 Bishop Manuel Edmilson da Cruz (101)Bishop emeritus of Limoeiro do Norte (Brazil) | 1966.08.08 | 1966.11.06 |
| Archbishop Próspero Penados del Barrio former Metropolitan Archbishop of Guatemala (Guatemala) | 1966.07.28 | 1966.11.19 |
| Bishop Robert Marie-Joseph François de Provenchères former Bishop of Créteil (France) | 1966.10.09 | 1966.11.20 |
| Bishop Jacques Marie Delarue former Bishop of Nanterre (France) | 1966.10.09 | 1966.11.20 |
| Bishop Jean François Marie Streiff former Bishop of Nevers (France) | 1966.09.21 | 1966.11.21 |
| Bishop Ignatius Salvador D’Souza former Bishop of Baroda (India) | 1966.09.29 | 1966.11.30 |
| Archbishop Brian David Usanga former Metropolitan Archbishop of Calabar (Nigeria) | 1966.08.05 | 1966.12.04 |
| Bishop James Louis Schad former Auxiliary Bishop of Camden (USA) | 1966.10.18 | 1966.12.08 |
| Bishop Albert Onyembo Lomandjo, C.S.Sp. former Bishop of Kindu (Congo-Kinshasa) | 1966.05.17 | 1966.12.11 |
| Bishop Livio Reginaldo Fischione, O.F.M. Cap. former Vicar Apostolic of Riohacha (Colombia) | 1966.09.29 | 1966.12.12 |
| Archbishop Gilberto Pereira Lopes former Metropolitan Archbishop of Campinas (Brazil) | 1966.11.03 | 1966.12.18 |
| Archbishop Bruno Wüstenberg former Titular Archbishop of Tyrus former Apostolic Pro-Nuncio to Netherlands | 1966.10.24 | 1966.12.21 |
| Bishop Basil Christopher Butler, E.B.C. former Auxiliary Bishop of Westminster (England) | 1966.11.29 | 1966.12.21 |
| Bishop Sergio Otoniel Contreras Navia former Bishop of Temuco (Chile) | 1966.11.21 | 1966.12.27 |
