The Roman Catholic Diocese of Cuautitlán (Latin: Dioecesis Cuautitlanensis) is based in the city of Cuautitlán, State of Mexico, Mexico.

It is a suffragan diocese of the Archdiocese of Tlalnepantla.

Pope John Paul II established the diocese on 5 February 1979.

On 9 June 2014, Pope Francis erected the new Diocese of Izcalli with territory taken from the diocese.

This article on a Roman Catholic diocese in Mexico is a stub.