| 1841 |
Apostolic Prefecture of Madagascar was established (from Apostolic Prefecture of Bourbon) |
| 1848.01.21 |
Apostolic Prefecture of Madagascar was promoted as Apostolic Vicariate of Madagascar |
| 1848.09.04 |
Apostolic Prefecture of Isole di Mayotta, Nossi-Bé e Comore was established (from Apostolic Vicariate of Madagascar) |
| 1896.01.16 |
Apostolic Vicariate of Southern Madagascar was established (from Apostolic Vicariate of Madagascar) |
| 1898.07.05 |
Apostolic Vicariate of Madagascar was renamed as Apostolic Vicariate of Central Madagascar (lost territory to establish Apostolic Vicariate of Northern Madagascar) |
| 1898.07.05 |
Apostolic Vicariate of Northern Madagascar was established (from Apostolic Vicariate of Madagascar) |
| 1913.05.10 |
Apostolic Vicariate of Fianarantsoa was established (from Apostolic Vicariate of Central Madagascar) |
| 1913.05.15 |
Apostolic Prefecture of Betafó was established (from Apostolic Vicariate of Central Madagascar) |
| 1913.05.20 |
Apostolic Vicariate of Northern Madagascar was renamed as Apostolic Vicariate of Diégo-Suarez |
| 1913.05.20 |
Apostolic Vicariate of Southern Madagascar was renamed as Apostolic Vicariate of Fort-Dauphin |
| 1913.05.20 |
Apostolic Vicariate of Central Madagascar was renamed as Apostolic Vicariate of Tananarive |
| 1918.08.24 |
Apostolic Prefecture of Betafó was promoted as Apostolic Vicariate of Betafó |
| 1921.01.10 |
Apostolic Vicariate of Betafó was renamed as Apostolic Vicariate of Antsirabé |
| 1923.03.15 |
Apostolic Vicariate of Majunga was established (from Apostolic Vicariate of Diégo-Suarez) |
| 1932.02.02 |
Apostolic Vicariate of Diégo-Suarez lost territory to Apostolic Prefecture of Isole di Mayotta, Nossi-Bé e Comore |
| 1933.12.13 |
Mission sui juris of Miarinarivo was established (from Apostolic Vicariate of Tananarive) |
| 1935.06.18 |
Apostolic Prefecture of Vatomandry was established (from Apostolic Vicariate of Fianarantsoa and Apostolic Vicariate of Tananarive) |
| 1938.01.08 |
Apostolic Prefecture of Morondava was established (from Apostolic Vicariate of Antsirabé, Apostolic Vicariate of Fianarantsoa, Apostolic Vicariate of Majunga and Apostolic Vicariate of Tananarive) |
| 1938.06.14 |
Apostolic Prefecture of Isole di Mayotta, Nossi-Bé e Comore was renamed as Apostolic Prefecture of Ambanja |
| 1939.03.15 |
Mission sui juris of Miarinarivo lost territory to Apostolic Prefecture of Morondava |
| 1939.05.25 |
Apostolic Vicariate of Majunga lost territory to Apostolic Vicariate of Miarinarivo |
| 1939.05.25 |
Mission sui juris of Miarinarivo was promoted as Apostolic Vicariate of Miarinarivo (gained territory from Apostolic Vicariate of Majunga and Apostolic Vicariate of Tananarive) |
| 1939.05.25 |
Apostolic Prefecture of Vatomandry was promoted as Apostolic Vicariate of Tamatave |
| 1939.05.25 |
Apostolic Vicariate of Tananarive lost territory to Apostolic Vicariate of Miarinarivo |
| 1949.01.13 |
Apostolic Prefecture of Tsiroanomandidy was established (from Apostolic Vicariate of Miarinarivo) |
| 1951.03.08 |
Apostolic Prefecture of Ambanja was promoted as Apostolic Vicariate of Ambanja |
| 1955.09.14 |
Apostolic Vicariate of Ambanja was promoted as Diocese of Ambanja (became suffragan of Tananarive) |
| 1955.09.14 |
Apostolic Vicariate of Antsirabé was promoted as Diocese of Antsirabé (became suffragan of Tananarive) |
| 1955.09.14 |
Apostolic Vicariate of Diégo-Suarez was promoted as Diocese of Diégo-Suarez (became suffragan of Tananarive) |
| 1955.09.14 |
Apostolic Vicariate of Fianarantsoa was promoted as Diocese of Fianarantsoa (became suffragan of Tananarive) |
| 1955.09.14 |
Apostolic Vicariate of Fort-Dauphin was promoted as Diocese of Fort-Dauphin (became suffragan of Tananarive) |
| 1955.09.14 |
Apostolic Vicariate of Majunga was promoted as Diocese of Majunga (became suffragan of Tananarive) |
| 1955.09.14 |
Apostolic Vicariate of Miarinarivo was promoted as Diocese of Miarinarivo (became suffragan of Tananarive) |
| 1955.09.14 |
Apostolic Prefecture of Morondava was promoted as Diocese of Morondava (became suffragan of Tananarive) |
| 1955.09.14 |
Apostolic Vicariate of Tamatave was promoted as Diocese of Tamatave (became suffragan of Tananarive) |
| 1955.09.14 |
Apostolic Vicariate of Tananarive was promoted as Metropolitan Archdiocese of Tananarive (with suffragan sees Ambanja, Antsirabé, Diégo-Suarez, Fianarantsoa, Fort-Dauphin, Majunga, Miarinarivo, Morondava and Tamatave) |
| 1957.04.08 |
Diocese of Farafangana was established (from Diocese of Fort-Dauphin and became suffragan of Tananarive) |
| 1957.04.08 |
Diocese of Tuléar was established (from Diocese of Fort-Dauphin and became suffragan of Tananarive) |
| 1958.12.11 |
Diocese of Diégo-Suarez was promoted as Metropolitan Archdiocese of Diégo-Suarez (with suffragan sees Ambanja and Majunga) |
| 1958.12.11 |
Diocese of Fianarantsoa was promoted as Metropolitan Archdiocese of Fianarantsoa (with suffragan sees Farafangana, Fort-Dauphin, Morondava and Tuléar) |
| 1958.12.11 |
Apostolic Prefecture of Tsiroanomandidy was promoted as Diocese of Tsiroanomandidy (became suffragan of Tananarive) |
| 1959.05.21 |
Diocese of Ambatondrazaka was established (from Metropolitan Archdiocese of Diégo-Suarez and Metropolitan Archdiocese of Tananarive and became suffragan of Tananarive) |
| 1960.04.25 |
Diocese of Morombe was established (from Diocese of Morondava and became suffragan of Fianarantsoa) |
| 1967.04.13 |
Diocese of Ihosy was established (from Diocese of Farafangana and Diocese of Fort-Dauphin and became suffragan of Fianarantsoa) |
| 1968.04.09 |
Diocese of Mananjary was established (from Metropolitan Archdiocese of Fianarantsoa and Diocese of Tamatave and became suffragan of Fianarantsoa) |
| 1989.10.28 |
Metropolitan Archdiocese of Tananarive was renamed as Metropolitan Archdiocese of Antananarivo |
| 1989.10.28 |
Metropolitan Archdiocese of Diégo-Suarez was renamed as Metropolitan Archdiocese of Antsiranana |
| 1989.10.28 |
Diocese of Majunga was renamed as Diocese of Mahajanga |
| 1989.10.28 |
Diocese of Tuléar was renamed as Diocese of Toliara |
| 1989.11.23 |
Diocese of Fort-Dauphin was renamed as Diocese of Tôlagnaro |
| 1990.01.31 |
Diocese of Tamatave was renamed as Diocese of Toamasina |
| 1993.10.18 |
Diocese of Port-Bergé was established (from Diocese of Mahajanga and became suffragan of Antsiranana) |
| 1999.06.03 |
Diocese of Ambositra was established (from Metropolitan Archdiocese of Fianarantsoa and became suffragan of Fianarantsoa) |
| 2000.10.30 |
Diocese of Fenoarivo Atsinanana was established (from Metropolitan Archdiocese of Antsiranana and became suffragan of Antsiranana) |
| 2003.11.14 |
Diocese of Toliara was promoted as Metropolitan Archdiocese of Toliara (with suffragan see Morombe) |
| 2006.05.13 |
Diocese of Moramanga was established (from Diocese of Ambatondrazaka and became suffragan of Antananarivo) |
| 2010.02.26 |
Diocese of Toamasina was promoted as Metropolitan Archdiocese of Toamasina (with suffragan sees Ambatondrazaka, Fenoarivo Atsinanana and Moramanga) |
| 2017.02.08 |
Diocese of Maintirano was established (from Diocese of Mahajanga, Diocese of Morondava and Diocese of Tsiroanomandidy and became suffragan of Antananarivo) |
