| Jurisdiction: | Diocese |
| Ilorin | |
| Latin: | Dioecesis Ilorinensis |
| Country: |  Nigeria |
| Territory: | Kwara State |
| Province: | Ibadan |
| Metropolitan: | Archbishop of Ibadan |
| Coordinates: | 8.5°N 4.55°W |
| Area Km2: | 32,500 |
| Population: | 1,260,000 |
| Population As Of: | 2004 |
| Catholics: | 25,500 |
| Catholics Percent: | 2.0 |
| Denomination: | Roman Catholic |
| Rite: | Latin Rite |
| Established: | May 29, 1969 |
| Cathedral: | Saint Joseph Cathedral in Ilorin |
| Bishop: | Anselm Pendo Lawani |
| Suffragan: | for one --> |
| Archdeacon: | for one--> |
| Emeritus Bishops: | Ayo-Maria Atoyebi, OP |
| Map: | Nigeria Kwara State map.png |
| Website: | http://www.catholicdioceseofilorin.org/ |
The Roman Catholic Diocese of Ilorin (Latin: Ilorinen(sis)) is a diocese located in the city of Ilorin in the ecclesiastical province of Ibadan in Nigeria.
The Cathedral is Saint Joseph Cathedral in Ilorin, Kwara State.