The Roman Catholic Diocese of Ciudad Obregón (Latin: Dioecesis Civitatis Obregonensis) (erected 20 June 1959).

It is centered in Ciudad Obregón, Sonora, Mexico.

It is a suffragan diocese of the Archdiocese of Hermosillo.

Along with the Archdiocese of Chihuahua and the Diocese of Ciudad Juárez, it yielded territory in 1966 to form the Territorial Prelature of Madera.

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