The Roman Catholic Diocese of Governador Valadares () is a diocese located in the city of Governador Valadares in the ecclesiastical province of Mariana in Brazil.
On 1 February 1956 Pope Pius XII established the Diocese of Governador Valadares from the Diocese of AraçuaÃÂ, the Diocese of Caratinga and the Metropolitan Archdiocese of Diamantina.