| Date | Country | Change |
| 1861 | Apostolic Vicariate of Kokonur 青海湖 was suppressed | |
| 1861 | Apostolic Vicariate of Constantinople (Bulgarian Rite) was established | |
| 1861 | Diocese of Melitene (Armenian Rite) was established | |
| 1861.05.23 | Diocese of Hexham was renamed as Diocese of Hexham and Newcastle | |
| 1861.08.13 | Apostolic Vicariate of Tamaulipas was established (from Diocese of Linares and became suffragan of México) | |
| 1861.09.08 | Diocese of Vitoria was established (from Metropolitan Archdiocese of Burgos, Diocese of Calahorra y La Calzada, Diocese of Pamplona–Tudela and Diocese of Santander and became suffragan of Burgos) | |
| 1861.10.03 | Diocese of Cap-Haïtien was established (from Metropolitan Archdiocese of Santo Domingo and became suffragan of Port-au-Prince) | |
| 1861.10.03 | Diocese of Les Cayes was established (from Metropolitan Archdiocese of Santo Domingo and became suffragan of Port-au-Prince) | |
| 1861.10.03 | Diocese of Les Gonaïves was established (from Metropolitan Archdiocese of Santo Domingo and became suffragan of Port-au-Prince) | |
| 1861.10.03 | Metropolitan Archdiocese of Port-au-Prince was established (from Metropolitan Archdiocese of Santo Domingo and with suffragan sees Cap-Haïtien, Les Cayes, Les Gonaïves and Port-de-Paix) | |
| 1861.10.03 | Diocese of Port-de-Paix was established (from Metropolitan Archdiocese of Santo Domingo and became suffragan of Port-au-Prince) | |
| 1861.10.07 | Diocese of Puno was established (from Diocese of Cusco and Diocese of La Paz and became suffragan of Lima) |
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