Chronology of Catholic Dioceses:Tonga
See a list of abbreviations used in this list. See also our listing of current ecclesial jurisdictions.
- 1830
- South Seas Islands / Oceania / Islands of the Great Ocean (AP) - Various countries and territories in Oceania
- 1836
- Western Oceania (AV, detached from AP South Seas Islands) - New Zealand and other territories in Oceania
- 1842
- Central Oceania (AV, detached from AV Western Oceania) - Tonga and other territories in Oceania
- 1937
- Tonga Island (AV, new name, previously Central Oceania AV) - Tonga
- 1957
- Tonga and Niue Islands (AV, new name, previously Tonga Islands) - Tonga
- 1966
- Tonga (D, and new name, previously Tonga and Niue Islands AV) - Tonga
