| Jurisdiction: | Diocese |
| Jales | |
| Latin: | Dioecesis Ialespolitanus |
| Country: |  Brazil |
| Rite: | Latin Rite |
| Established: | 12 December 1959 (years ago) |
| Cathedral: | Catedral Nossa Senhora da Assunção |
| Area Km2: | 12,788 |
| Population: | 359,702 |
| Population As Of: | 2004 |
| Catholics: | 291,000 |
| Catholics Percent: | 80.9 |
| Metro Archbishop: | Moacir Silva |
| Bishop: | José Reginaldo Andrietta |
| Website: | www.diocesedejales.org.br |
The Roman Catholic Diocese of Jales (Latin: Dioecesis Ialespolitanus) is a diocese located in the city of Jales in the ecclesiastical province of Ribeirão Preto in Brazil.