| Date | Country | Change |
| 1841 | Apostolic Prefecture of Madagascar was established (from Apostolic Prefecture of Bourbon) | |
| 1841 | Diocese of Chur lost territory to Diocese of Basel | |
| 1841 | Apostolic Prefecture of Jedda was renamed as Apostolic Prefecture of Aden | |
| 1841.02.13 | Diocese of Bardstown was suppressed (to establish Diocese of Louisville) | |
| 1841.02.13 | Diocese of Louisville was established (from the suppressed Diocese of Bardstown and became suffragan of Baltimore) | |
| 1841.03.04 | Diocese of Gent lost territory to Apostolic Vicariate of Breda | |
| 1841.04.03 | Apostolic Prefecture of Batavia was promoted as Apostolic Vicariate of Batavia | |
| 1841.04.22 | Apostolic Prefecture of Hong Kong 香港 was established (from Diocese of Macau 澳門) | |
| 1841.07.10 | Apostolic Prefecture of Texas was promoted as Apostolic Vicariate of Texas | |
| 1841.09.10 | Apostolic Vicariate of Western Siam was restored (from Apostolic Vicariate of Siam) | |
| 1841.09.10 | Apostolic Vicariate of Siam was renamed as Apostolic Vicariate of Eastern Siam (lost territory to establish Apostolic Vicariate of Western Siam) | |
| 1841.10.01 | Diocese of Cambrai was promoted as Metropolitan Archdiocese of Cambrai (with suffragan see Arras) | |
| 1841.11.25 | Abbacy nullius of Farfa was suppressed (to Diocese of Rieti and to establish Diocese of Poggio Mirteto) | |
| 1841.11.25 | Diocese of Poggio Mirteto was established (from Diocese of Rieti and Diocese of Sabina and from the suppressed Abbacy nullius of Farfa and Abbacy nullius of San Salvatore Maggiore) | |
| 1841.11.25 | Diocese of Sabina lost territory to Diocese of Narni and Diocese of Tivoli | |
| 1841.11.25 | Abbacy nullius of San Salvatore Maggiore was suppressed (to Diocese of Rieti and to establish Diocese of Poggio Mirteto) | |
| 1841.12.17 | Diocese of Toronto was established (from Diocese of Kingston) |
© 2026 GCatholic.org