| Date | Age | Event | Bishop | Title | Current Title |
|---|
| 24 Jun 2008 | 75.8 | Retired | Rinaldo Fidel Brédice | Bishop of Santa Rosa | Bishop Emeritus |
| 75.5 | Retired | Omar Félix Colomé | Bishop of Cruz del Eje | Bishop Emeritus |
| 49.5 | Appointed | Santiago Olivera | Bishop of Cruz del Eje |
| 60.6 | Appointed | Mario Aurelio Poli | Bishop of Santa Rosa |
| 4 Jul 2008 | 57.6 | Ordained Bishop | Hugo Nicolás Barbaro | Bishop of San Roque de Presidencia Roque Sáenz Peña |
| 16 Jul 2008 | 44.6 | Appointed | Sergio Osvaldo Buenanueva | Auxiliary Bishop of Mendoza |
| 44.6 | Appointed | Sergio Osvaldo Buenanueva | Titular Bishop of Rusubbicari | Auxiliary Bishop of Mendoza |
| 26 Jul 2008 | 57.6 | Installed | Hugo Nicolás Barbaro | Bishop of San Roque de Presidencia Roque Sáenz Peña |
| 6 Aug 2008 | 52.4 | Ordained Bishop | Luis Mariano Montemayor | Titular Archbishop of Illici | Apostolic Nuncio to Sénégal |
| 18 Aug 2008 | 49.6 | Ordained Bishop | Santiago Olivera | Bishop of Cruz del Eje |
| 4 Sep 2008 | 45.7 | Appointed | Enrique Eguía Seguí | Auxiliary Bishop of Buenos Aires |
| 45.7 | Appointed | Enrique Eguía Seguí | Titular Bishop of Cissi | Auxiliary Bishop of Buenos Aires |
| 17 Sep 2008 | 52.5 | Appointed | Luis Mariano Montemayor | Apostolic Nuncio to Guinea-Bissau | Apostolic Nuncio to Sénégal |
| 27 Sep 2008 | 44.8 | Ordained Bishop | Sergio Osvaldo Buenanueva | Titular Bishop of Rusubbicari | Auxiliary Bishop of Mendoza |
| 4 Oct 2008 | 45.6 | Appointed | Damián Santiago Bitar | Auxiliary Bishop of San Justo |
| 45.6 | Appointed | Damián Santiago Bitar | Titular Bishop of Turris Tamalleni | Auxiliary Bishop of San Justo |
| 11 Oct 2008 | 45.8 | Ordained Bishop | Enrique Eguía Seguí | Titular Bishop of Cissi | Auxiliary Bishop of Buenos Aires |
| 14 Oct 2008 | 56.2 | Appointed | Jorge Rubén Lugones, S.J. | Bishop of Lomas de Zamora |
| 22 Nov 2008 | 56.3 | Installed | Jorge Rubén Lugones, S.J. | Bishop of Lomas de Zamora |
| 47.8 | Appointed | Ariel Edgardo Torrado Mosconi | Auxiliary Bishop of Santiago del Estero |
| 47.8 | Appointed | Ariel Edgardo Torrado Mosconi | Titular Bishop of Vicus Pacati | Auxiliary Bishop of Santiago del Estero |
| 24 Nov 2008 | 47.5 | Appointed | José Luís Gerardo Ponce de León, I.M.C. | Vicar Apostolic of Ingwavuma, South Africa |
| 47.5 | Appointed | José Luís Gerardo Ponce de León, I.M.C. | Titular Bishop of Maturba | Vicar Apostolic of Ingwavuma, South Africa |
| 1 Dec 2008 | 75.1 | Retired | Horacio Ernesto Benites Astoul | Auxiliary Bishop of Buenos Aires | Auxiliary Bishop Emeritus |
| 8 Dec 2008 | 45.8 | Ordained Bishop | Damián Santiago Bitar | Titular Bishop of Turris Tamalleni | Auxiliary Bishop of San Justo |
| 13 Dec 2008 | 47.9 | Ordained Bishop | Ariel Edgardo Torrado Mosconi | Titular Bishop of Vicus Pacati | Auxiliary Bishop of Santiago del Estero |
| 10 Jan 2009 | 86.6 | Died | Pio Laghi † | Cardinal, Prefect Emeritus of the Congregation for Catholic Education (for Seminaries and Institutes of Study) |
| 14 Jan 2009 | 38.7 | Appointed | Sviatoslav Shevchuk | Auxiliary Bishop of Santa María del Patrocinio en Buenos Aires (Ukrainian) |
| 38.7 | Appointed | Sviatoslav Shevchuk | Titular Bishop of Castra Galbae | Auxiliary Bishop of Santa María del Patrocinio en Buenos Aires (Ukrainian) |
| 24 Jan 2009 | 62.2 | Appointed | Luis Alberto Fernández | Auxiliary Bishop of Buenos Aires |
| 62.2 | Appointed | Luis Alberto Fernández | Titular Bishop of Carpi | Auxiliary Bishop of Buenos Aires |
| 14 Mar 2009 | 51.0 | Appointed | José Slaby, C.Ss.R. | Prelate of Esquel |
| 27 Mar 2009 | 62.4 | Ordained Bishop | Luis Alberto Fernández | Titular Bishop of Carpi | Auxiliary Bishop of Buenos Aires |
| 7 Apr 2009 | 38.9 | Ordained Bishop | Sviatoslav Shevchuk | Titular Bishop of Castra Galbae | Auxiliary Bishop of Santa María del Patrocinio en Buenos Aires (Ukrainian) |
| 18 Apr 2009 | 47.9 | Ordained Bishop | José Luís Gerardo Ponce de León, I.M.C. | Titular Bishop of Maturba | Vicar Apostolic of Ingwavuma, South Africa |
| 8 May 2009 | 48.1 | Appointed | Marcelo Daniel Colombo | Bishop of Orán |
| 51.2 | Ordained Bishop | José Slaby, C.Ss.R. | Prelate of Esquel |
| 13 Jun 2009 | 60.5 | Appointed | Victor Selvino Arenhart | Bishop of Oberá |
| 8 Aug 2009 | 48.4 | Ordained Bishop | Marcelo Daniel Colombo | Bishop of Orán |
| 15 Aug 2009 | 60.6 | Ordained Bishop | Victor Selvino Arenhart | Bishop of Oberá |
| 22 Aug 2009 | 48.4 | Installed | Marcelo Daniel Colombo | Bishop of Orán |
| 7 Oct 2009 | 63.0 | Appointed | Óscar Vicente Ojea Quintana | Coadjutor Bishop of San Isidro |
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