| Jurisdiction: | Diocese |
| Atlacomulco | |
| Latin: | Dioecesis Atlacomulcana |
| Local: | Diócesis de Atlacomulco |
| Country: |  Mexico |
| Metropolitan: | Atlacomulco |
| Province: | Province of Toluca |
| Area Sqmi: | 2,071 |
| Population: | 878,061 |
| Population As Of: | 2006 |
| Catholics: | 865,404 |
| Catholics Percent: | 98.6 |
| Parishes: | 64 |
| Denomination: | Roman Catholic |
| Rite: | Roman Rite |
| Established: | 3 November 1984 (years ago) |
| Cathedral: | Cathedral of the Divine Providence |
| Bishop: | vacant |
| Metro Archbishop: | Francisco Javier Chavolla Ramos |
| Emeritus Bishops: | Juan Odilón Martínez García |
| Map: | Roman Catholic Diocese of Atlacomulco in Mexico.jpg |
The Roman Catholic Diocese of Atlacomulco (Latin: Dioecesis Atlacomulcana) (erected 3 November 1984) is a suffragan diocese of the Archdiocese of Toluca.