The Roman Catholic Diocese of Guarulhos () is a diocese located in the city of Guarulhos in the ecclesiastical province of São Paulo in Brazil.
History 30 January 1981: Established as Diocese of Guarulhos from the Diocese of Mogi das Cruzes
Bishops Ordinaries Bishops of Guarulhos (Roman rite) Bishop João Bergese (1981.02.11 – 1991.05.05; Appointed Archbishop of Pouso Alegre) Bishop Luiz Gonzaga Bergonzini (1991.12.04 – 2011.11.23) Bishop Joaquim Justino Carreira (2011.11.23 - 2013.09.01) Bishop Edmilson Amador Caetano, O. Cist. (2014.01.29-)
Other priest of this diocese who became bishop Otacilio Francisco Ferreira de Lacerda, appointed Auxiliary Bishop of Belo Horizonte, Minas Gerais.
References GCatholic.org Catholic Hierarchy Diocese website (Portuguese)