| Jurisdiction: | Diocese |
| Lafia | |
| Latin: | Dioecesis Lafiensis |
| Country: |  Nigeria |
| Province: | Abuja |
| Metropolitan: | Archbishop of Abuja |
| Coordinates: | 8.4917°N 8.5167°W |
| Area Km2: | 28,500 |
| Population: | 1,867,241 |
| Population As Of: | 2004 |
| Catholics: | 189,686 |
| Catholics Percent: | 10.2 |
| Denomination: | Roman Catholic |
| Rite: | Latin Rite |
| Cathedral: | Saint William Cathedral in Lafia |
| Bishop: | David Ajang |
| Suffragan: | for one --> |
| Archdeacon: | for one--> |
| Map: | Nigeria Nasarawa State map.png |
The Roman Catholic Diocese of Lafia (Latin: Lafien(sis)) is a diocese located in the city of Lafia in the ecclesiastical province of Abuja in Nigeria.
The Cathedral is St. William's Cathedral in Lafia.