| Jurisdiction: | Diocese |
| Duque de Caxias | |
| Latin: | Dioecesis Caxiensis |
| Rite: | Latin Rite |
| Established: | 11 October 1980 (years ago) |
| Cathedral: | Catedral Santo Antônio |
| Area Km2: | 511 |
| Population: | 1,235,626 |
| Population As Of: | 2004 |
| Catholics: | 976,000 |
| Catholics Percent: | 79.0 |
| Metro Archbishop: | Orani João Tempesta, O. Cist. |
| Bishop: | Tarcísio Nascentes dos Santos |
The Roman Catholic Diocese of Duque de Caxias (Latin: Dioecesis Caxiensis) is a diocese located in the city of Duque de Caxias in the ecclesiastical province of São Sebastião do Rio de Janeiro in Brazil.