The Diocese of Crookston, suffragan of the metropolitan See of St. Paul and Minneapolis, was established December 31, 1909, from the western half of the Diocese of Duluth, MN, comprising 17, 210 square miles of western Minnesota, comprising the 14 counties of Kittson, Roseau, Lake of the Woods, Marshall, Polk, Red Lake, Pennington, Clearwater, Beltrami, Norman, Mahnomen, Hubbard, Clay and Becker. More information & History Map: Diocese of Crookston Chancery Map: Cathedral of the Immaculate Concepton, Crookston