Compiled by Fr. Precious Ezeh
METROPOLITAN ARCHDIOCESE OF ABUJA (Raised to a Metropolitan on 26th March 1994)
*Eight Dioceses:*
1. Abuja Diocese (19 June 1989)
2. Diocese of Otukpo (10 July 1995)
3. Diocese of Makurdi (28 June 1960)
4. Diocese of Lokoja( 5 May 1965)
5. Diocese of Idah (17 December 1977)
6. Diocese of Lafia (5 December 2000)
7. Diocese of Katsina-Ala (29 December 2012)
8. Diocese of Gboko ( 29 December 2012)
METROPOLITAN ARCHDIOCESE OF BENIN (Raised to a Metropolitan on 26th March 1994)
*Six Dioceses:*
1. Diocese of Benin (18 April 1950)
2. Warri Diocese (10 March 1964)
3. Issele-Uku Diocese (5 July 1973)
4. Uromi Diocese (14 December 2005)
5. Bomadi Diocese (21 September 2017)
6. Auchi Diocese (4 December 2002)
METROPOLITAN ARCHDIOCESE OF CALABAR ( Raised to a Metropolitan on 26th March 1994)
*Five Dioceses*
1. Diocese of Calabar (18 April 1950)
2. Ogoja Diocese (1 January 1955)
3. Port Harcourt Diocese (16 May 1961)
4. Ikot Ekpene Diocese (1 March 1963)
5. Uyo Diocese(4 July 1989)
METROPOLITAN ARCHDIOCESE OF IBADAN (Raised to a Metropolitan on 26th March 1994)
*Six Dioceses*
1. Diocese of Ibadan (28 April 1958)
2. Ondo Diocese (18 April 1950)
3. Oyo Diocese (18 January 1963)
4. Ilorin Diocese (29 May 1969)
5. Ekiti Diocese (11 December 1972)
6. Osogbo Diocese (3 March 1995)
METROPOLITAN ARCHDIOCESE OF JOS (Raised to a Metropolitan on 26th March 1994)
*Eight Dioceses*
1. Jos Diocese (29 June 1953)
2. Yola Diocese( 2 July 1962)
3. Maiduguri Diocese (7 June 1966)
4. Jalingo Diocese (3 February 1995)
5. Bauchi Diocese (31 December 2003)
6. Shendam Diocese (2 June 2007)
7. Pankshin Diocese (18 March 2014)
8. Wukari Diocese (14 December 2022)
METROPOLITAN ARCHDIOCESE OF KADUNA (Raised to a Metropolitan on 16th July 1959)
*Eight Dioceses*
1. Kaduna Diocese (29 June 1953)
2. Sokoto Diocese (16 June 1964)
3. Minna Diocese (17 September 1973)
4. Kafanchan Diocese (10 July 1995)
5. Kano Diocese (22nd June 1999)
6. Zaria Diocese (5 December 2000)
7. Kontagora Diocese (2nd April 2020)
8. Katsina Diocese (16 October 2023)
METROPOLITAN ARCHDIOCESE OF LAGOS (Raised to a Metropolitan on 18th April 1950)
*Three Dioceses*
1. Lagos Diocese (Raised to Apostolic Vicariate on 12 Jan. 1943)
2. Ijebu-Ode Diocese (29 May 1969)
3. Abeokuta Diocese (24 October 1997)
METROPOLITAN ARCHDIOCESE OF ONITSHA (Raised to a Metropolitan on 18th April 1950)
*Nine Dioceses*
1. Onitsha Diocese (Raised from Apostolic Vicariate of Southern Nigeria to Onitsha-Owerri Vicariate on 12 Feb. 1948)
2. Enugu Diocese (12 November 1962)
3. Abakaliki Diocese(1 March1973)
4. Awka Diocese (10 November 1977)
5. Nsukka Diocese (19 November 1990)
6. Nnewi Diocese (9 November 2001)
7. Awgu Diocese(8 July 2005)
8. Ekwulobia Diocese (5 March 2020)
9. Aguleri Diocese (12 February 2023)
METROPOLITAN ARCHDIOCESE OF OWERRI (Raised to a Metropolitan on 26th March 1994)
*Six Dioceses*
1. Owerri Diocese (18th April 1950)
2. Umuahia Diocese (23 June 1958)
3. Orlu Diocese (29 November 1980)
4. Okigwe Diocese (24th January 1981)
5. Ahiara Diocese (18 November 1987)
6. Aba Diocese (2 April 1990)