| Jurisdiction: | Diocese |
| Ji-Paraná | |
| Latin: | Dioecesis Giparanensis |
| Country: |  Brazil |
| Rite: | Latin Rite |
| Established: | 3 January 1978 (years ago) |
| Cathedral: | Catedral São João Bosco |
| Area Km2: | 120,000 |
| Population: | 709,938 |
| Population As Of: | 2004 |
| Catholics: | 480,000 |
| Catholics Percent: | 67.6 |
| Metro Archbishop: | Roque Paloschi |
| Bishop: | Norbert Hans Christoph Foerster, S.V.D. |
| Website: | www.diocesedejiparana.org.br |
The Roman Catholic Diocese of Ji-Paraná (Latin: Dioecesis Giparanensis) is a diocese located in the city of Ji-Paraná in the ecclesiastical province of Porto Velho in Brazil.