The Diocese of Guiratinga (Dioecesis Guiratingensis) was a former ecclesiastical circumscription of the Catholic Church in Brazil, belonging to the Ecclesiastical Province of Cuiabá and the West II Regional Bishops' Council of the National Conference of Bishops of Brazil, being a suffragan of the Archdiocese of Cuiabá. The episcopal see is the Cathedral St. John the Baptist in the city of Guiratinga in the state of Mato Grosso.