| Date | Country | Change |
| 2010 | Titular Episcopal See of Parembolæ in Phœnicia was renamed as Titular Episcopal See of Parembolæ in Arabia | |
| 2010 | Titular Episcopal See of Saccæa was suppressed | |
| 2010.01.15 | Diocese of Mananthavady (Syro-Malabar Rite) lost territory to Diocese of Bhadravathi | |
| 2010.01.18 | Diocese of Mandya (Syro-Malabar Rite) was established (from Diocese of Mananthavady and became suffragan of Tellicherry) | |
| 2010.01.18 | Diocese of Ramanathapuram (Syro-Malabar Rite) was established (from Diocese of Palghat and became suffragan of Trichur) | |
| 2010.01.19 | Apostolic Prefecture of Donkorkrom was promoted as Apostolic Vicariate of Donkorkrom | |
| 2010.01.20 | Apostolic Vicariate of Hosanna was restored (from Apostolic Vicariate of Soddo–Hosanna) | |
| 2010.01.20 | Apostolic Vicariate of Soddo–Hosanna was renamed as Apostolic Vicariate of Soddo (lost territory to establish Apostolic Vicariate of Hosanna) | |
| 2010.01.25 | Diocese of Pathanamthitta (Syro-Malankara Rite) was established (from Metropolitan Archdiocese of Trivandrum and became suffragan of Trivandrum) | |
| 2010.01.25 | Diocese of Puthur (Syro-Malankara Rite) was established (from Diocese of Bathery and became suffragan of Tiruvalla) | |
| 2010.01.30 | Diocese of Maliana was established (from Diocese of Díli) | |
| 2010.02.20 | Territorial Prelature of Calama was promoted as Diocese of San Juan Bautista de Calama | |
| 2010.02.26 | Diocese of Toamasina was promoted as Metropolitan Archdiocese of Toamasina (with suffragan sees Ambatondrazaka, Fenoarivo Atsinanana and Moramanga) | |
| 2010.04.29 | Apostolic Prefecture of Quetta was promoted as Apostolic Vicariate of Quetta | |
| 2010.05.01 | Apostolic Administration of Comores was promoted as Apostolic Vicariate of Archipel des Comores | |
| 2010.05.01 | Territorial Prelature of Ipil was promoted as Diocese of Ipil | |
| 2010.05.22 | Diocese of Kalay was established (from Diocese of Hakha and became suffragan of Mandalay) | |
| 2010.05.22 | Diocese of Tunis was promoted as Archdiocese of Tunis | |
| 2010.05.31 | Metropolitan Archdiocese of Pescara–Penne lost territory to Metropolitan Archdiocese of Chieti–Vasto | |
| 2010.06.16 | Diocese of Salgueiro was established (from Diocese of Floresta and Diocese of Petrolina and became suffragan of Olinda e Recife) | |
| 2010.07.14 | Apostolic Exarchate of United States of America (Syro-Malankara Rite) was established | |
| 2010.07.21 | Diocese of Karonga was established (from Diocese of Mzuzu and became suffragan of Blantyre) | |
| 2010.11.27 | Diocese of Bunda was established (from Metropolitan Archdiocese of Mwanza and Diocese of Musoma and became suffragan of Mwanza) | |
| 2010.12.15 | Diocese of Camaçari was established (from Metropolitan Archdiocese of São Salvador da Bahia and became suffragan of São Salvador da Bahia) | |
| 2010.12.18 | Diocese of Tilarán was renamed as Diocese of Tilarán–Liberia |
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