| Date of Death | Deceased Persons (17) |
| 2012 | Priest of Hajdúdorog of the Hungarians (Hungary) (1948 – 2012) Prelate of Honour of His Holiness (1993.02.26 – 2009.03.16) Protonotary Apostolic Supernumerary (2009.03.16 – 2012) |
| 2012.01.12 | Priest of Sisak (Croatia) (? – 2012.01.12) Prelate of Honour of His Holiness (2012.01.12 – 2012.01.12) |
| 2012.01.12 | Prefect of Vatican Secret Archives (1984.05.24 – 1996.07.27) |
| 2012.01.25 | Priest of Fabriano (Italy) (1945.08.12 – 1979.01.11) Prelate of Honour of His Holiness (1963.12.23 – 2012.01.25) Prelate Auditor of Tribunal of the Roman Rota (1979.01.11 – 1996) |
| 2012.02.05 | Apostolic Administrator of Kunming 昆明 (China) (2000 – 2012.02.05) Apostolic Administrator of Dali 大理 (China) (2000 – 2012.02.05) Apostolic Administrator of Zhaotong 昭通 (China) (2000 – 2012.02.05) |
| 2012.02.26 | Abbot Ordinary of Maria Einsiedeln (Switzerland) ([1969.10.10] 1969.11.03 – 2001.11.09) |
| 2012.02.27 | Priest of Bogotá (Colombia) (? – 2010?) Prelate of Honour of His Holiness (2000.03.25 – 2012.02.27) |
| 2012.03.16 | Priest of Beijing 北京 (China) (1945.03.05 – 1957) Priest of Taipei 臺北 (Taiwan) (1957 – 2012.03.16) Prelate of Honour of His Holiness (1983.06.14 – 2012.03.16) |
| 2012.04.25 | Priest of Vic (Spain) (? – 2012.04.25) Prelate of Honour of His Holiness (2000.03.09 – 2012.04.25) |
| 2012.05.11 | Undersecretary of Congregation for the Evangelisation of Peoples (2001.10.01 – 2012.05.11) |
| 2012.07.09 | Bishop-Prelate of Batanes and the Babuyan Islands (Philippines) (1966.11.18 – 1995) |
| 2012.07.13 | |
| 2012.08.22 | Abbot Ordinary of Pannonhalma (Hungary) (1973.03.14 – 1991) |
| 2012.09.19 | Priest of Como (Italy) (1969.06.22 – 2012.09.19) Chaplain of His Holiness (1992.03.18 – 2012.09.19) General Ecclesiastical Assistant of Catholic University of the Sacred Heart (2008.03.18 – 2012.09.19) |
| 2012.10.13 | Priest of Campobasso–Boiano (Italy) (? – 2012.10.13) Chaplain of His Holiness (2009.01.24 – 2012.10.13) |
| 2012.11.05 | |
| 2012.11.14 | Priest of Toronto (Canada) (1941.06.07 – 2012.11.14) Prelate of Honour of His Holiness (1992.08.04 – 2012.11.14) |
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