| Jurisdiction: | Diocese |
| Ecatepec | |
| Latin: | Dioecesis Ecatepecensis |
| Local: | Diócesis de Ecatepec |
| Country: |  Mexico |
| Metropolitan: | Ecatepec de Morelos |
| Province: | Province of Tlalnepantla |
| Area Sqmi: | 78 |
| Population: | 4,300,000 |
| Population As Of: | 2006 |
| Catholics: | 3,400,000 |
| Catholics Percent: | 79.1 |
| Parishes: | 89 |
| Denomination: | Roman Catholic |
| Rite: | Roman Rite |
| Established: | 5 February 1979 (years ago) |
| Cathedral: | Cathedral of the Sacred Heart of Jesus |
| Bishop: | Vacant |
The Roman Catholic Diocese of Ecatepec (Latin: Dioecesis Ecatepecensis) (erected 28 June 1995) is a suffragan diocese of the Archdiocese of Tlalnepantla in Mexico. The see city is Ecatepec de Morelos in the state of Mexico.