Date | Country | Change |
| 1952 |  Algeria | Titular Episcopal See of Legia was renamed as Titular Episcopal See of Legia |
| 1952 |  Egypt | Titular Episcopal See of Tebe di Tebaide was suppressed (to Titular Episcopal See of Diospolis superior) |
| 1952 |  Tunisia | Titular Episcopal See of Agbia was renamed as Titular Episcopal See of Agbia |
| 1952.01.03 |  Bangladesh | Diocese of Jessore was established (from Metropolitan Archdiocese of Calcutta, gained territory from Diocese of Krishnagar and became suffragan of Dacca) |
| 1952.01.03 |  India | Diocese of Krishnagar lost territory to Diocese of Jessore |
| 1952.01.06 |  Italy | Metropolitan Archdiocese of Santa Severina was demoted as Archdiocese of Santa Severina (without ecclesiastical province) |
| 1952.01.10 |  Congo-Kinshasa | Apostolic Vicariate of Kivu was renamed as Apostolic Vicariate of Costermansville (lost territory to establish Apostolic Vicariate of Kasongo) |
| 1952.01.10 | Congo-Kinshasa | Apostolic Vicariate of Kasongo was established (from Apostolic Vicariate of Baudouinville and Apostolic Vicariate of Kivu) |
| 1952.01.10 |  Falkland Islands | Apostolic Prefecture of Falkland Islands was established (from Diocese of Punta Arenas) |
| 1952.01.10 |  Tanzania | Apostolic Prefecture of Mbulu was promoted as Apostolic Vicariate of Mbulu |
| 1952.01.17 | India | Apostolic Prefecture of Haflong was established (from Metropolitan Archdiocese of Dacca and Diocese of Chittagong) |
| 1952.01.17 | India | Apostolic Prefecture of Jalandhar was established (from Diocese of Lahore and became suffragan of Delhi and Simla) |
| 1952.01.17 | India | Diocese of Jalpaiguri was established (from Diocese of Dinajpur and became suffragan of Calcutta) |
| 1952.01.17 | India | Apostolic Prefecture of Kashmir and Jammu was established (from Diocese of Lahore and Diocese of Rawalpindi and became suffragan of Delhi and Simla) |
| 1952.01.17 | India | Apostolic Prefecture of Malda was established (from Diocese of Dinajpur and became suffragan of Calcutta) |
| 1952.02.07 |  South Africa | Diocese of Mthatha lost territory to Diocese of Queenstown |
| 1952.02.14 |  Malaysia | Apostolic Prefecture of Northern Borneo was promoted as Apostolic Vicariate of Jesselton |
| 1952.02.14 | Malaysia | Apostolic Prefecture of Sarawak was promoted as Apostolic Vicariate of Kuching |
| 1952.02.14 |  Rwanda | Apostolic Vicariate of Ruanda was renamed as Apostolic Vicariate of Kabgayi (lost territory to establish Apostolic Vicariate of Nyundo) |
| 1952.02.14 | Rwanda | Apostolic Vicariate of Nyundo was established (from Apostolic Vicariate of Ruanda) |
| 1952.02.16 |  Brazil | Diocese of Amazonas was promoted as Metropolitan Archdiocese of Manaus (with suffragan sees Guajará-Mirim, Juruá, Lábrea, Porto Velho, Rio Branco, Rio Negro, São Peregrino Laziosi no Alto Acre e Alto Purus and Tefé) |
| 1952.02.16 | Brazil | Diocese of Marília was established (from Diocese of Lins and became suffragan of São Paulo) |
| 1952.02.16 | Brazil | Diocese of Natal was promoted as Metropolitan Archdiocese of Natal (with suffragan sees Caicó and Mossoró) |
| 1952.02.16 |  USA | Diocese of Baker City was renamed as Diocese of Baker |
| 1952.02.28 |  Japan | Apostolic Administration of Okinawa and the Southern Islands 琉球列島 lost territory to Apostolic Prefecture of Kagoshima 鹿児島 |
| 1952.03.13 |  Central African Republic | Apostolic Prefecture of Berbérati was promoted as Apostolic Vicariate of Berbérati |
| 1952.03.13 |  Laos | Apostolic Prefecture of Vientiane et Louang-Prabang was promoted as Apostolic Vicariate of Vientiane |
| 1952.03.13 |  Nigeria | Apostolic Prefecture of Ibadan was established (from Metropolitan Archdiocese of Lagos) |
| 1952.04.03 |  Sierra Leone | Apostolic Prefecture of Makeni was established (from Diocese of Freetown and Bo) |
| 1952.04.29 |  Canada | Diocese of Fort William was established (from Metropolitan Archdiocese of Saint-Boniface and Diocese of Sault Sainte Marie and became suffragan of Toronto) |
| 1952.05.15 |  Cote d’Ivoire | Apostolic Vicariate of Katiola was established (from the suppressed Apostolic Prefecture of Korhogo) |
| 1952.05.15 | Cote d’Ivoire | Apostolic Prefecture of Korhogo was suppressed (to establish Apostolic Vicariate of Katiola) |
| 1952.05.15 | India | Apostolic Prefecture of Indore was promoted as Diocese of Indore |
| 1952.05.15 |  Malawi | Apostolic Vicariate of Shiré was renamed as Apostolic Vicariate of Blantyre (lost territory to establish Apostolic Vicariate of Zomba) |
| 1952.05.15 | Malawi | Apostolic Vicariate of Zomba was established (from Apostolic Vicariate of Shiré) |
| 1952.05.15 |  Papua New Guinea | Apostolic Prefecture of Aitape was established (from Apostolic Vicariate of Central New Guinea) |
| 1952.05.15 | Papua New Guinea | Apostolic Vicariate of Eastern New Guinea was renamed as Apostolic Vicariate of Alexishafen |
| 1952.05.15 | Papua New Guinea | Apostolic Vicariate of Central New Guinea was renamed as Apostolic Vicariate of Wewak (lost territory to establish Apostolic Prefecture of Aitape) |
| 1952.06.19 | India | Diocese of Alleppey was established (from Diocese of Cochin and became suffragan of Goa and Daman) |
| 1952.06.19 |  Indonesia | Apostolic Prefecture of Padang was established (from Apostolic Vicariate of Palembang) |
| 1952.06.19 | Indonesia | Apostolic Prefecture of Tandjung-Karang was established (from Apostolic Vicariate of Palembang) |
| 1952.07.10 |  Senegal | Apostolic Prefecture of Ziguinchor was promoted as Apostolic Vicariate of Ziguinchor |
| 1952.07.10 |  Zambia | Apostolic Prefecture of Fort Rosebery was established (from Apostolic Vicariate of Bangweulu) |
| 1952.07.10 | Zambia | Apostolic Vicariate of Bangweulu was renamed as Apostolic Vicariate of Kasama (lost territory to establish Apostolic Prefecture of Fort Rosebery) |
| 1952.07.26 |  France | Military Vicariate of France was established |
| 1952.08.07 |  Taiwan | Apostolic Prefecture of Chiayi 嘉義 was established (from Apostolic Prefecture of Kaohsung 高雄 and became suffragan of Taipei 臺北) |
| 1952.08.07 | Taiwan | Apostolic Prefecture of Hualien 花蓮 was established (from Apostolic Prefecture of Kaohsung 高雄 and Apostolic Prefecture of Taipei 臺北 and became suffragan of Taipei 臺北) |
| 1952.08.07 | Taiwan | Apostolic Prefecture of Taipei 臺北 was promoted as Metropolitan Archdiocese of Taipei 臺北 (with suffragan sees Chiayi 嘉義, Hualien 花蓮, Kaohsung 高雄 and Taichung 臺中 and lost territory to establish Apostolic Prefecture of Hualien 花蓮) |
| 1952.08.09 | Brazil | Diocese of Teresina was promoted as Metropolitan Archdiocese of Teresina (with suffragan sees Oeiras, Parnaíba and Bom Jesus do Piauí) |
| 1952.08.09 | USA | Diocese of Kansas City was promoted as Metropolitan Archdiocese of Kansas City (with suffragan sees Dodge City, Salina and Wichita) |
| 1952.11.13 | India | Metropolitan Archdiocese of Madras was renamed as Metropolitan Archdiocese of Madras and Mylapore (gained territory from the suppressed Diocese of São Tomé de Meliapor, lost territory to establish Diocese of Tanjore and Diocese of Vellore and gained suffragan sees Tanjore and Vellore) |
| 1952.11.13 | India | Diocese of São Tomé de Meliapor was suppressed (to Metropolitan Archdiocese of Madras and Mylapore) |
| 1952.11.13 | India | Diocese of Tanjore was established (from Metropolitan Archdiocese of Madras and became suffragan of Madras and Mylapore) |
| 1952.11.13 | India | Diocese of Vellore was established (from Metropolitan Archdiocese of Madras and became suffragan of Madras and Mylapore) |
| 1952.11.14 |  Colombia | Diocese of Antioquía lost territory to Apostolic Vicariate of Quibdó |
| 1952.11.14 | Colombia | Apostolic Vicariate of Buenaventura was established (from Diocese of Cali and Apostolic Prefecture of Tumaco) |
| 1952.11.14 | Colombia | Apostolic Vicariate of Istmina was established (from Apostolic Prefecture of Chocó) |
| 1952.11.14 | Colombia | Apostolic Prefecture of Chocó was promoted as Apostolic Vicariate of Quibdó (gained territory from Diocese of Antioquía and lost territory to establish Apostolic Vicariate of Istmina) |
| 1952.11.29 | Brazil | Territorial Prelature of Cametá was established (from Metropolitan Archdiocese of Belém do Pará and became suffragan of Belém do Pará) |
| 1952.12.04 | Colombia | Apostolic Vicariate of Goajira was renamed as Apostolic Vicariate of Riohacha (lost territory to establish Apostolic Vicariate of Valledupar) |
| 1952.12.04 | Colombia | Apostolic Vicariate of Valledupar was established (from Apostolic Vicariate of Goajira) |
| 1952.12.11 | Japan | Apostolic Vicariate of Sapporo 札幌 was promoted as Diocese of Sapporo 札幌 (gained territory from Diocese of Sendai 仙台) |
| 1952.12.11 | Japan | Diocese of Sendai 仙台 lost territory to Diocese of Sapporo 札幌 |
| 1952.12.11 |  Lesotho | Diocese of Leribe was established (from Diocese of Maseru and became suffragan of Bloemfontein) |
| 1952.12.17 | Colombia | Diocese of Armenia was established (from Diocese of Manizales and Apostolic Vicariate of Quibdó and became suffragan of Medellín) |
| 1952.12.17 | Colombia | Diocese of Bucaramanga was established (from Diocese of Nueva Pamplona and became suffragan of Bogotá in Colombia) |
| 1952.12.17 | Colombia | Diocese of Palmira was established (from Metropolitan Archdiocese of Popayán and Diocese of Cali and became suffragan of Popayán) |
| 1952.12.17 | Colombia | Diocese of Pereira was established (from Diocese of Manizales and Apostolic Vicariate of Quibdó and became suffragan of Medellín) |
| 1952.12.20 |  Ireland | Diocese of Ardfert and Aghadoe was renamed as Diocese of Kerry |
| 1952.12.22 | India | Diocese of Warangal was established (from Diocese of Hyderabad and became suffragan of Madras and Mylapore) |
