 | 1910 | 1911 | 1912 |  |
Date | Country | Change |
| 1911 |  Israel | Titular Episcopal See of Nazareth (Maronite Rite) was suppressed |
| 1911 |  Italy | Diocese of Tuscanella was renamed as Diocese of Tuscania |
| 1911 |  North Macedonia | Titular Metropolitan See of Achrida (Armenian Rite) was established |
| 1911.02.07 |  Eritrea | Apostolic Prefecture of Eritrea was promoted as Apostolic Vicariate of Eritrea |
| 1911.02.14 |  Sudan | Apostolic Vicariate of Central Africa lost territory to Apostolic Prefecture of Oubangui Chari |
| 1911.03.01 |  Guam | Apostolic Vicariate of Guam was established (from the suppressed Apostolic Prefecture of Mariana Islands) |
| 1911.03.01 |  Micronesia,  Palau | Apostolic Prefecture of Caroline Islands was promoted as Apostolic Vicariate of Mariana and Caroline Islands (gained territory from the suppressed Apostolic Prefecture of Mariana Islands) |
| 1911.03.01 |  Northern Mariana Islands | Apostolic Prefecture of Mariana Islands was suppressed (to Apostolic Vicariate of Mariana and Caroline Islands and to establish Apostolic Vicariate of Guam) |
| 1911.04.07 |  Congo-Kinshasa | Apostolic Prefecture of Ubangui belge was established (from Apostolic Vicariate of Congo Belge) |
| 1911.04.08 |  South Korea,  North Korea | Apostolic Vicariate of Korea 조선 was renamed as Apostolic Vicariate of Seoul 서울 (lost territory to establish Apostolic Vicariate of Taiku 대구) |
| 1911.04.08 | South Korea | Apostolic Vicariate of Taiku 대구 was established (from Apostolic Vicariate of Korea 조선) |
| 1911.04.12 |  China | Apostolic Vicariate of Central Shaanxi 陝西中境 was established (from Apostolic Vicariate of Northern Shaanxi 陝西北境) |
| 1911.05.02 | China | Apostolic Prefecture of Western Honan 河南西境 was promoted as Apostolic Vicariate of Western Honan 河南西境 |
| 1911.05.09 |  Argentina | Apostolic Vicariate of Patagonia Septentrional was suppressed (to Metropolitan Archdiocese of Buenos Aires, Diocese of La Plata and Diocese of San Juan de Cuyo) |
| 1911.06.11 |  Turkiye | Apostolic Exarchate of Turkey of Europe (Greek Rite) was established |
| 1911.06.30 | Congo-Kinshasa | Apostolic Prefecture of Northern Katanga was established (from Apostolic Vicariate of Congo Belge and Apostolic Prefecture of Kasaï Supérieur) |
| 1911.06.30 |  Indonesia | Apostolic Prefecture of Sumatra was established (from Apostolic Vicariate of Batavia) |
| 1911.07.01 | Congo-Kinshasa | Apostolic Prefecture of Matadi was established (from Apostolic Vicariate of Congo Belge) |
| 1911.07.18 |  Brazil | Territorial Prelature of Santíssima Conceição do Araguaia was established (from Metropolitan Archdiocese of Belém do Pará and became suffragan of Belém do Pará) |
| 1911.08.12 |  USA | Diocese of Des Moines was established (from Diocese of Davenport and became suffragan of Dubuque) |
| 1911.08.24 |  Nigeria | Apostolic Prefecture of Eastern Nigeria was established (from Apostolic Prefecture of Upper Niger) |
| 1911.08.24 | Nigeria | Apostolic Prefecture of Upper Niger was renamed as Apostolic Prefecture of Western Nigeria (lost territory to establish Apostolic Prefecture of Eastern Nigeria) |
| 1911.08.29 |  India | Apostolic Vicariate of Kottayam (Syro-Malabar Rite) was restored (from Apostolic Vicariate of Changanacherry and Apostolic Vicariate of Ernakulam) |
| 1911.10.28 |  England | Diocese of Birmingham was promoted as Metropolitan Archdiocese of Birmingham (with suffragan sees Clifton, Menevia and Shrewsbury) |
| 1911.10.28 | England,  Isle of Man | Diocese of Liverpool was promoted as Metropolitan Archdiocese of Liverpool (with suffragan sees Hexham and Newcastle, Leeds, Middlesbrough and Salford) |
| 1911.11.17 |  Cote d’Ivoire | Apostolic Prefecture of Costa d’Avorio was promoted as Apostolic Vicariate of Costa d’Avorio (lost territory to establish Apostolic Prefecture of Korhogo) |
| 1911.11.17 | Cote d’Ivoire | Apostolic Prefecture of Korhogo was established (from Apostolic Prefecture of Costa d’Avorio) |
| 1911.12.18 | Congo-Kinshasa | Apostolic Prefecture of Uélé was renamed as Apostolic Prefecture of Uélé Occidentale (lost territory to establish Apostolic Prefecture of Uélé Orientale) |
| 1911.12.18 | Congo-Kinshasa | Apostolic Prefecture of Uélé Orientale was established (from Apostolic Prefecture of Uélé) |
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