The Roman Catholic Diocese of Chiclayo (Latin: Chiclayen(sis)) is a Latin Catholic suffragan diocese in the ecclesiastical province of Piura in Peru's northwestern Lambayeque region.

Its cathedral episcopal see is Catedral Santa María in the city of Chiclayo.

The Diocese of Chiclayo was established on 17 December 1956 as the Diocese of Chiclayo on territory split off from the Diocese of Cajamarca and Metropolitan Archdiocese of Trujillo.

On 17 April 1963, some of its territory was lost to form the Territorial Prelature of Chota.

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