The Roman Catholic Diocese of Cancún–Chetumal (Latin: Dioecesis Cancunensis–Chetumaliensis) is a suffragan of the Metropolitan Archdiocese of Yucatán.

It was elevated from a Roman Catholic Territorial Prelature on February 15, 2020.

It was erected on 23 May 1970 as the Territorial Prelature of Chetumal, renamed 20 December 1996, as reflected in its double see-name.

[1] It has a cathedral see, Catedral de la Santísima Trinidad, in Cancun, and a co-cathedral, Catedral del Sagrado Corazón, in Chetumal, both in Quintana Roo on the Yucatán Peninsula.

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