The Roman Catholic Diocese of Pontoise, is a diocese of the Latin Rite of the Roman Catholic church in France. Erected in 1966, the diocese was split off from the Diocese of Versailles, and the Archdiocese of Paris. As of 2011, the diocese remains a suffragan of the Archdiocese of Paris.
Bishop Olivier Jean-Marie Michel de Berranger, appointed in 1996, resigned on Jan. 15, 2009.