| Jurisdiction: | Diocese |
| Abakaliki | |
| Latin: | Dioecesis Abakalikiensis |
| Country: |  Nigeria |
| Province: | Onitsha |
| Metropolitan: | Archbishop of Onitsha |
| Area Km2: | 5,953 |
| Population: | 1,769,000 |
| Population As Of: | 2006 |
| Catholics: | 374,680 |
| Catholics Percent: | 21.2 |
| Parishes: | 74 |
| Denomination: | Roman Catholic |
| Rite: | Latin Rite |
| Priests: | 90 |
| Bishop Title: | Bishop |
| Suffragan: | for one --> |
| Archdeacon: | for one--> |
| Website: | www.AbakalikiDiocese.org |
The Diocese of Abakaliki is a Roman Catholic diocese with its headquarters in Abakaliki, Nigeria. It was erected on 1 March 1973 from the territory of the Diocese of Ogoja with the Right Reverend Thomas McGettrick SPS as its first bishop.
There is also a Bishop and Diocese of Abakaliki in the Anglican Church of Nigeria.