The Roman Catholic Archdiocese of Detroit () is an archdiocese of the Latin Rite of the Catholic Church covering () the Michigan counties of Lapeer, Macomb, Monroe, Oakland, St. Clair, and Wayne. It is the metropolitan archdiocese for the Roman Catholic Ecclesiastical Province of Detroit, which includes all dioceses in the state of Michigan. In addition, in 2000 the archdiocese accepted pastoral responsibility for the Roman Catholic Church in the Cayman Islands, which consists of Saint Ignatius Parish on Grand Cayman (the Archdiocese of Kingston maintains a mission "sui iuris" jurisdiction over the Cayman Islands).