The Apostolic Vicariate of Keewatin (Latin: Vicariatus Apostolicus Keevatinensis) was a Roman Catholic missionary pre-diocesan jurisdiction in northern Canada (see Keewatin proper) which included the northern half of the Province of Saskatchewan, and was bounded on the north by the Arctic regions, on the south by the Roman Catholic Archdiocese of Saint-Boniface, on the east by the then Apostolic Vicariate of Temiskaming, and on the west by the Diocese of St Albert and the then Apostolic Vicariate of Athabasca.