| Jurisdiction: | Diocese |
| Macapá | |
| Latin: | Dioecesis Macapensis |
| Local: | Diocese de Macapá |
| Country: | Brazil |
| Metropolitan: | Belém do Pará |
| Rite: | Latin Rite |
| Established: | 1 February 1949 (years ago) |
| Cathedral: | Cathedral of St Joseph in Macapá |
| Area Km2: | 148,000 |
| Population: | 339,000 |
| Population As Of: | 2004 |
| Catholics: | 279,000 |
| Catholics Percent: | 82.3 |
| Metro Archbishop: | Alberto Taveira Corrêa |
| Website: | www.diocesedemacapa.com.br |
The Roman Catholic Diocese of Macapá (Latin: Dioecesis Macapensis) is a diocese located in the city of Macapá in the ecclesiastical province of Belém do Pará in Brazil.