| Jurisdiction: | Diocese |
| Hazaribag | |
| Latin: | Dioecesis Hazaribaganus |
| Metropolitan: | Ranchi |
| Rite: | Roman Rite |
| Cathedral: | Cathedral of the Resurrection in Hazaribagh |
| Area Km2: | 21,213 |
| Population: | 5,067,000 |
| Population As Of: | 2006 |
| Catholics: | 35,252 |
| Catholics Percent: | 0.7 |
| Bishop: | Anand Jojo |
| Metro Archbishop: | Telesphore Toppo |
The Roman Catholic Diocese of Hazaribag (Latin: Hazaribagan(us)) is a diocese located in the city of Hazaribag in the ecclesiastical province of Ranchi in India.