Ordained Bishop | Years | Name | Current Title |
| 30 Jul 1978 |
| Archbishop Thomas A. White | Apostolic Nuncio Emeritus to Fiji, Pacific (Oceania) |
| 10 Dec 1982 |
| Bishop Domenico Crescentino Marinozzi, O.F.M. Cap. | Vicar Apostolic Emeritus of Soddo-Hosanna |
| 15 Sep 1985 |
| Archbishop Patrick Coveney | Apostolic Nuncio Emeritus to Greece |
| 22 Feb 1993 |
| Archbishop Ramiro Moliner Inglés | Apostolic Nuncio to Albania |
| 23 May 1993 |
| Bishop Woldetensaé Ghebreghiorghis, O.F.M. Cap. | Vicar Apostolic of Harar |
| 19 Mar 1994 |
| Bishop Lorenzo Ceresoli, M.C.C.I. | Vicar Apostolic Emeritus of Awasa |
| 17 Aug 1996 |
| Archbishop Silvano Maria Tomasi, C.S. | Apostolic Nuncio to Other |
| 25 Jan 1998 |
| Archbishop Berhaneyesus Demerew Souraphiel, C.M. | Archbishop of Addis Abeba (Ethiopian) |
| 6 Jan 2000 |
| Archbishop George Panikulam | Apostolic Nuncio to Ethiopia |
| 20 Jan 2002 |
| Bishop Tesfasellassie Medhin | Bishop of Adigrat (Ethiopian) |
| 10 May 2003 |
| Bishop Abraham Desta | Vicar Apostolic of Meki |
| 8 Feb 2004 |
| Bishop Musie Ghebreghiorghis, O.F.M. Cap. | Bishop of Emdeber (Ethiopian) |
| 4 Mar 2007 |
| Bishop Rodrigo Mejía Saldarriaga, S.J. | Vicar Apostolic of Soddo |
| 31 May 2009 |
| Bishop Giovanni Migliorati, M.C.C.I. | Vicar Apostolic of Awasa |
| 30 Aug 2009 |
| Bishop Theodorus van Ruijven (van Ruyven), C.M. | Vicar Apostolic of Nekemte |
| 24 Jan 2010 |
| Bishop Markos Ghebremedhin, C.M. | Vicar Apostolic of Jimma-Bonga |
| 31 Jan 2010 |
| Bishop Angelo Moreschi, S.D.B. | Vicar Apostolic of Gambella |
| 11 Apr 2010 |
| Bishop Woldeghiorghis Mathewos | Vicar Apostolic of Hosanna |
| 18 Apr 2010 |
| Bishop Lisane-Christos Matheos Semahun | Auxiliary Bishop of Addis Abeba (Ethiopian) |