| Date | Age | Event | Bishop | Title | Current Title |
| 1 Dec | 63.7 | Appointed | Giovanni Giudici | Bishop of Pavia, Italy |
| 68.6 | Ordained Bishop | Peter Antony Moran | Bishop of Aberdeen, Scotland, Great Britain | Bishop Emeritus |
| 75.7 | Retired | Giovanni Volta † | Bishop of Pavia, Italy | Bishop Emeritus |
| 2 Dec | 55.4 | Appointed | Raymond Leo Burke | Archbishop of Saint Louis, Missouri, USA | Cardinal, Prefect of the Apostolic Signatura |
| 67.8 | Resigned | Joseph Oyanga | Bishop of Lira, Uganda | Bishop Emeritus |
| 3 Dec | 49.3 | Appointed | Sérgio Aparecido Colombo | Bishop of Paranavaí, Parana, Brazil | Bishop of Bragança Paulista, Sao Paulo, Brazil |
| 76.2 | Confirmed | Emmanuel III (Emmanuel-Karim) Delly | Patriarch of Babylon {Babilonia} (Chaldean), Iraq | Cardinal, Patriarch Emeritus |
| 76.2 | Confirmed | Emmanuel III (Emmanuel-Karim) Delly | Archbishop of Baghdad (Chaldean), Iraq | Cardinal, Patriarch Emeritus of Babylon {Babilonia} (Chaldean), Iraq |
| 76.2 | Retired | Lino Esterino Garavaglia, O.F.M. Cap. | Bishop of Cesena-Sarsina, Italy | Bishop Emeritus |
| 57.5 | Appointed | Antonio Lanfranchi | Bishop of Cesena-Sarsina, Italy | Archbishop of Modena-Nonantola, Italy |
| 76.8 | Retired | Alfredo Magarotto | Bishop of Vittorio Veneto, Italy | Bishop Emeritus |
| 76.9 | Retired | Paolo Magnani | Bishop of Treviso, Italy | Bishop Emeritus |
| 55.3 | Appointed | Andrea Bruno Mazzocato | Bishop of Treviso, Italy | Archbishop of Udine, Italy |
| 58.0 | Appointed | Fulgence Rabeony, S.J. | Archbishop of Toliara, Madagascar |
| 75.5 | Retired | Rubens Augusto de Souza Espínola | Bishop of Paranavaí, Parana, Brazil | Bishop Emeritus |
| 56.7 | Appointed | Giuseppe Zenti | Bishop of Vittorio Veneto, Italy | Bishop of Verona, Italy |
| 4 Dec | 54.6 | Installed | Leonard Paul Blair | Bishop of Toledo, Ohio, USA |
| 5 Dec | 52.6 | Appointed | Ulises Antonio Gutiérrez Reyes, O. de M. | Bishop of Carora, Venezuela | Archbishop of Ciudad Bolívar, Venezuela |
| 76.2 | Retired | Eduardo Herrera Riera † | Bishop of Carora, Venezuela | Bishop Emeritus |
| 44.7 | Appointed | Ramón José Viloria Pinzón, S.O.D. | Bishop of Puerto Cabello, Venezuela | Bishop Emeritus |
| 6 Dec | 89.5 | Died | Luiz Roberto Gomes de Arruda, T.O.R. † | Prelate Emeritus of Guajará-Mirim, Rondonia, Brazil |
| 8 Dec | 43.6 | Ordained Bishop | Cornel Damian | Titular Bishop of Iziriana | Auxiliary Bishop of Bucarest {Bucureşti}, Romania |
| 56.3 | Installed | Kevin John Patrick McDonald | Archbishop of Southwark, England, Great Britain | Archbishop Emeritus |
| 85.8 | Died | Fernando Vargas Ruiz de Somocurcio, S.J. † | Archbishop Emeritus of Arequipa, Peru |
| 9 Dec | 47.3 | Appointed | Robert Brahm | Auxiliary Bishop of Trier, Germany |
| 47.3 | Appointed | Robert Brahm | Titular Bishop of Mimiana | Auxiliary Bishop of Trier, Germany |
| 43.6 | Appointed | Jörg Michael Peters | Auxiliary Bishop of Trier, Germany |
| 43.6 | Appointed | Jörg Michael Peters | Titular Bishop of Forum Traiani | Auxiliary Bishop of Trier, Germany |
| 10 Dec | 50.7 | Appointed | Valdomiro Koubetch, O.S.B.M. | Coadjutor Bishop of São João Batista em Curitiba (Ukrainian), Brazil | Bishop |
| 11 Dec | 59.7 | Ordained Bishop | Luis Alberto Parra Mora | Bishop of Mocoa-Sibundoy, Colombia |
| 50.2 | Appointed | Oscar Azarcon Solis | Auxiliary Bishop of Los Angeles, California, USA |
| 50.2 | Appointed | Oscar Azarcon Solis | Titular Bishop of Urci | Auxiliary Bishop of Los Angeles, California, USA |
| 82.3 | Died | Paulos Tzadua † | Cardinal, Archbishop Emeritus of Addis Abeba (Ethiopian), Ethiopia |
| 12 Dec | 77.8 | Died | Joseph Anthony Ferrario † | Bishop Emeritus of Honolulu, Hawaii, USA |
| 61.6 | Appointed | Paul Hinder, O.F.M. Cap. | Auxiliary Bishop of Arabia, Yemen | Vicar Apostolic of Southern Arabia, Yemen |
| 61.6 | Appointed | Paul Hinder, O.F.M. Cap. | Titular Bishop of Macon | Vicar Apostolic of Southern Arabia, Yemen |
| 56.3 | Appointed | Gonzalo Restrepo Restrepo | Auxiliary Bishop of Cali, Colombia | Archbishop of Manizales, Colombia |
| 56.3 | Appointed | Gonzalo Restrepo Restrepo | Titular Bishop of Munatiana | Archbishop of Manizales, Colombia |
| 50.9 | Appointed | Filipe Neri António Sebastião do Rosário Ferrão | Archbishop of Goa e Damão, India |
| 50.9 | Appointed | Filipe Neri António Sebastião do Rosário Ferrão | Patriarch of East Indies, India | Archbishop of Goa e Damão, India |
| 66.4 | Appointed | Victor Antonio Tamayo Betancourt | Auxiliary Bishop of Barranquilla, Colombia |
| 66.4 | Appointed | Victor Antonio Tamayo Betancourt | Titular Bishop of Voncariana | Auxiliary Bishop of Barranquilla, Colombia |
| 54.3 | Installed | David Allen Zubik | Bishop of Green Bay, Wisconsin, USA | Bishop of Pittsburgh, Pennsylvania, USA |
| 13 Dec | 59.7 | Died | Johannes Sudiarna Hadiwikarta † | Bishop of Surabaya, Indonesia |
| 66.7 | Installed | Attilio Nicora | Cardinal-Deacon of San Filippo Neri in Eurosia | Cardinal, President Emeritus of the Administration of the Patrimony of the Apostolic See |
| 14 Dec | 48.9 | Ordained Bishop | Jesús Sanz Montes, O.F.M. | Bishop of Huesca, Spain | Archbishop of Oviedo, Spain |
| 48.3 | Ordained Bishop | Manfred Scheuer | Bishop of Innsbruck, Austria |
| 57.7 | Installed | Joseph Mitsuaki Takami, P.S.S. | Archbishop of Nagasaki, Japan |
| 60.7 | Installed | Jean-Louis Pierre Tauran | Cardinal-Deacon of Sant’Apollinare alle Terme Neroniane-Alessandrine | Cardinal, President of the Pontifical Council for Interreligious Dialogue |
| 15 Dec | 70.3 | Appointed | Bernardo Hombach Lütkermeier | Bishop of Granada, Nicaragua | Bishop Emeritus |
| 76.5 | Retired | Leovigildo López Fitoria, C.M. | Bishop of Granada, Nicaragua | Bishop Emeritus |
| 16 Dec | 75.5 | Retired | Giacomo Biffi | Archbishop of Bologna, Italy | Cardinal, Archbishop Emeritus |
| 65.5 | Appointed | Carlo Caffarra | Cardinal, Archbishop of Bologna, Italy |
| 17 Dec | 66.5 | Appointed | Joseph Edra Ukpo | Archbishop of Calabar, Nigeria | Archbishop Emeritus |
| 75.1 | Retired | Brian David Usanga † | Archbishop of Calabar, Nigeria | Archbishop Emeritus |
| 18 Dec | 67.1 | Appointed | Pier Giacomo Grampa | Bishop of Lugano, Switzerland |
| 66.2 | Installed | Henry Joseph Mansell | Archbishop of Hartford, Connecticut, USA |
| 75.9 | Retired | Giuseppe Torti † | Bishop of Lugano, Switzerland | Bishop Emeritus |
| 19 Dec | 55.4 | Appointed | Rigoberto Corredor Bermúdez | Bishop of Garzón, Colombia | Bishop of Pereira, Colombia |
| 71.8 | Resigned | Arthur Luysterman | Bishop of Gent {Ghent, Gand}, Belgium | Bishop Emeritus |
| 41.9 | Appointed | Thomas Luke Msusa, S.M.M. | Bishop of Zomba, Malawi |
| 43.7 | Appointed | John Philip Saklil | Bishop of Timika, Indonesia |
| 64.8 | Appointed | Edgar Hernando Tirado Mazo, M.X.Y. | Vicar Apostolic of Tierradentro, Colombia |
| 64.8 | Appointed | Edgar Hernando Tirado Mazo, M.X.Y. | Titular Bishop of Zaba | Vicar Apostolic of Tierradentro, Colombia |
| 62.2 | Appointed | Lucas Van Looy, S.D.B. | Bishop of Gent {Ghent, Gand}, Belgium |
| 20 Dec | 56.9 | Installed | Thomas James Olmsted | Bishop of Phoenix, Arizona, USA |
| 21 Dec | 41.7 | Ordained Bishop | Jean-Jacques Koffi Oi Koffi | Bishop of Abengourou, Côte d’Ivoire | Bishop of San Pedro-en-Côte d’Ivoire |
| 48.9 | Installed | Jesús Sanz Montes, O.F.M. | Bishop of Jaca, Spain | Archbishop of Oviedo, Spain |
| 24 Dec | 77.1 | Retired | Josef Koukl † | Bishop of Litoměřice, Czech Republic | Bishop Emeritus |
| 47.5 | Appointed | Paul Ponen Kubi, C.S.C. | Auxiliary Bishop of Mymensingh, Bangladesh | Bishop |
| 47.5 | Appointed | Paul Ponen Kubi, C.S.C. | Titular Bishop of Turris Tamalleni | Bishop of Mymensingh, Bangladesh |
| 50.5 | Appointed | Pavel Posád | Bishop of Litoměřice, Czech Republic | Auxiliary Bishop of Ceské Budĕjovice {Budweis}, Czech Republic |
| 27 Dec | 57.6 | Appointed | Francisco Javier Chavolla Ramos | Bishop of Toluca, México, México |
| 60.4 | Appointed | José Luis Dibildox Martínez | Bishop of Tampico, Tamaulipas, México |
| 76.2 | Retired | Rafael Gallardo García, O.S.A. | Bishop of Tampico, Tamaulipas, México | Bishop Emeritus |
| 57.7 | Appointed | Jesús Murgui Soriano | Bishop of Mallorca, Spain | Bishop of Orihuela-Alicante, Spain |
| 64.1 | Ordained Bishop | Giovanni Scanavino, O.S.A. | Bishop of Orvieto-Todi, Italy | Bishop Emeritus |
| 28 Dec | 84.1 | Died | Henrique Froehlich, S.J. † | Bishop Emeritus of Sinop, Mato Grosso, Brazil |
| 92.2 | Died | Miguel Angel García y Aráuz † | Bishop Emeritus of Jalapa, Guatemala |
| 29 Dec | 58.9 | Died | Michael Aidan Courtney † | Apostolic Nuncio to Burundi |
| 35.7 | Ordained Priest | George Rajendran Kuttinadar, S.D.B. | Priest of Salesians of Saint John Bosco | Bishop of Thuckalay (Syro-Malabarese), India |
| 54.9 | Ordained Bishop | Jose Romeo Orquejo Lazo | Bishop of Kalibo, Philippines | Bishop of San Jose de Antique, Philippines |
| 81.7 | Died | Joseph Hubertus Soudant, S.C.I. † | Bishop Emeritus of Palembang, Indonesia |
| 30 Dec | 68.3 | Appointed | Velasio De Paolis, C.S. | Titular Bishop of Thelepte | Cardinal, President Emeritus of the Prefecture for the Economic Affairs of the Holy See |
| 68.3 | Appointed | Velasio De Paolis, C.S. | Secretary of the Apostolic Signatura | Cardinal, President Emeritus of the Prefecture for the Economic Affairs of the Holy See |
| 75.3 | Retired | Francesco Saverio Salerno | Secretary of the Apostolic Signatura | Secretary Emeritus |
| 31 Dec | 62.0 | Appointed | John Francis Moore, S.M.A. † | Bishop of Bauchi, Nigeria |