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.

Ordinaries

• Onésimo Cepeda Silva (1995 - 2012)
• Oscar Roberto Domínguez Couttolenc, M.G. (2012 – 2024)