The Catholic Church in Nigeria is part of the worldwide Catholic Church, under the spiritual leadership of the Pope and curia in Rome.

The Roman Catholic Church is the world's largest Christian Church, and its largest religious grouping. There are an estimated 17 Million baptised Catholics in Nigeria, some 15% of the population.

Within Nigeria the heirarchy consists of:

Archbishopric Bishopric

• Abuja
  • Idah
  • Lafia
  • Lokoja
  • Makurdi
  • Otukpo

• Benin City
  • Auchi
  • Issele-Uku
  • Warri

• Calabar
  • Ikot Ekpene
  • Ogoja
  • Port Harcourt
  • Uyo

• Ibadan
  • Ekiti
  • Ondo
  • Osogbo
  • Oyo

• Jos
  • Jalingo
  • Maiduguri
  • Yola

• Kaduna
  • Ilorin
  • Kafanchan
  • Kano
  • Minna
  • Sokoto
  • Zaria

• Lagos (Cardinal Archbishop)
  • Abeokuta
  • Ijebu-Ode

• Onitsha
  • Abakaliki
  • Awka
  • Enugu
  • Nnewi
  • Nsukka

• Owerri
  • Aba
  • Ahiara
  • Okigwe
  • Orlu
  • Umuahia