 | 1871 | 1872 | 1873 |  |
Date | Country | Change |
| 1872 |  Italy | Diocese of Mantova lost territory to Diocese of Carpi |
| 1872 | Italy | Diocese of Corneto was renamed as Diocese of Tarquinia |
| 1872.01.29 |  Colombia | Diocese of Medellín–Antioquía was renamed as Diocese of Medellín |
| 1872.02.15 |  USA | Diocese of Ogdensburg was established (from Diocese of Albany and became suffragan of New York) |
| 1872.02.16 | USA | Diocese of Providence was established (from Diocese of Boston and Diocese of Hartford and became suffragan of New York) |
| 1872.06.03 | Italy | Diocese of Acireale was established (from Metropolitan Archdiocese of Messina and Archdiocese of Catania and without ecclesiastical province) |
| 1872.11.02 |  Chile | Mission sui juris of Valparaíso was established (from Metropolitan Archdiocese of Santiago and became suffragan of Santiago) |
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