| Date | From | To |
|---|
| unknown | | | Congregation of the Blessed Sacrament
| Founded |
| 21 Jan | | | Vicariate Apostolic of Kiangnan, China
| Erected |
| 21 Feb | Diocese of Toronto, Ontario, Canada
| Erected |
| 29 Feb | Diocese of Newfoundland, Canada
| Territory Lost | Diocese of Harbour Grace, Newfoundland, Canada
| Erected |
| 29 Feb | Diocese of Toronto, Ontario, Canada
| Territory Lost | Diocese of Hamilton, Ontario, Canada
| Erected |
| 29 Feb | Diocese of Newfoundland, Canada
| Name Changed | Diocese of Saint John’s, Newfoundland, Canada
| Name Changed |
| 2 Apr | Vicariate Apostolic of Peking [Beijing], China
| Territory Lost | Vicariate Apostolic of Southwestern Chi-Li {Ce-Li Meridio-Occidentale}, China
| Erected |
| 2 Apr | | | Vicariate Apostolic of Eastern Szechwan {Se-Ciuen Orientale}, China
| Erected |
| 2 Apr | | | Vicariate Apostolic of Northwestern Szechwan {Se-Ciuen Settentrionale-Occidentale}, China
| Name Changed |
| 20 Apr | Vicariate Apostolic of Se-Ciuen, China
| Name Changed |
| 30 May | Vicariate Apostolic of Peking [Beijing], China
| Territory Lost | Vicariate Apostolic of Southeastern Chi-Li {Ce-Li Meridio-Orientale}, China
| Erected |
| 30 May | Vicariate Apostolic of Peking [Beijing], China
| Name Changed | Vicariate Apostolic of Northern Chi-Li {Ce-Li Settentrionale} o Pe-Kin, China
| Name Changed |
| 8 Dec | | | Society of African Missions
| Founded |
| 25 Dec | | | Istituto del Prado
| Founded |
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