List of Roman Catholic dioceses in Nigeria

The Roman Catholic church in Nigeria is comprised of 9 ecclesiastical provinces and 41 suffragan dioceses.

List of dioceses

Episcopal Conference of Nigeria

Ecclesiastical Province of Abuja

*Archdiocese of Abuja
**Diocese of Idah
**Diocese of Lafia
**Diocese of Lokoja
**Diocese of Makurdi
**Diocese of Otukpo

Ecclesiastical Province of Benin City

*Archdiocese of Benin City
**Diocese of Auchi
**Diocese of Issele-Uku
**Diocese of Uromi
**Diocese of Warri

Ecclesiastical Province of Calabar

*Archdiocese of Calabar
**Diocese of Ikot Ekpene
**Diocese of Ogoja
**Diocese of Port Harcourt
**Diocese of Uyo

Ecclesiastical Province of Ibadan

*Archdiocese of Ibadan
**Diocese of Ekiti
**Diocese of Ondo
**Diocese of Osogbo
**Diocese of Oyo

Ecclesiastical Province of Jos

*Archdiocese of Jos
**Diocese of Bauchi
**Diocese of Jalingo
**Diocese of Maiduguri
**Diocese of Shendam
**Diocese of Yola

Ecclesiastical Province of Kaduna

*Archdiocese of Kaduna
**Diocese of Ilorin
**Diocese of Kafanchan
**Diocese of Kano
**Diocese of Minna
**Diocese of Sokoto
**Diocese of Zaria

Ecclesiastical Province of Lagos

*Archdiocese of Lagos
**Diocese of Abeokuta
**Diocese of Ijebu-Ode

Ecclesiastical Province of Onitsha

*Archdiocese of Onitsha
**Diocese of Abakaliki
**Diocese of Awgu
**Diocese of Awka
**Diocese of Enugu
**Diocese of Nnewi
**Diocese of Nsukka

Ecclesiastical Province of Owerri

*Archdiocese of Owerri
**Diocese of Aba
**Diocese of Ahiara
**Diocese of Okigwe
**Diocese of Orlu
**Diocese of Umuahia