County	Founded	Parent County	County Seat
Adams	1885	Stark	Hettinger
Barnes	1875	Cass	Valley City
Benson	1883	Ramsey	Minnewaukan
Billings	1879	Unorganized Territory	Medora
Bottineau	1873	Unorganized Territory	Bottineau
Bowman	1883	Billings	Bowman
Burke	1910	Ward	Bowbells
Burleigh	1873	Buffalo (Discontinued)	Bismarck
Cass	1873	Original County	Fargo
Cavalier	1873	Pembina	Langdon
Dickey	1881	LaMoure	Ellendale
Divide	1910	Williams	Crosby
Dunn	1883	Howard (Discontinued)	Manning
Eddy	1885	Foster	New Rockford
Emmons	1879	Unorganized territory	Linton
Foster	1873	Pembina	Carrington
Golden Valley	1912	Billings	Beach
Grand Forks	1873	Pembina	Grand Forks
Grant	1916	Morton	Carson
Griggs	1881	Foster	Cooperstown
Hettinger	1883	Stark	Mott
Kidder	1873	Buffalo (Discontinued)	Steele
La Moure	1873	Pembina	La Moure
Logan	1873	Buffalo (Discontinued)	Napolean
McHenry	1873	Buffalo (Discontinued)	Towner
McIntosh	1883	Logan	Ashley
McKenzie	1883	Howard	Watford City
McLean	1883	Stevens	Washburn
Mercer	1875	Original Territory	Stanton
Morton	1873	Original Territory	Mandan
Mountrail	1873	Ward	Stanley
Nelson	1883	Foster, Grand Forks	Lakota
Oliver	1885	Mercer	Center
Pembina	1867	Indian Lands (Dakota)	Cavalier
Pierce	1887		Rugby
Ramsey	1873	Pembina	Devil's Lake
Ransom	1873	Pembina	Lisbon
Renville	1873	Duel, Pembina	Mohall
Richland	1873	Original County	Wahpeton
Rolette	1873	Buffalo (Discontinued)	Rolla
Sargent	1883	Ransom	Forman
Sheridan	1873	Buffalo (Discontinued)	McClusky
Sioux	1915		Fort Yates
Slope	1915	Billings	Amidon
Stark	1879	Unorganized Territory	Dickinson
Steele	1883	Original County	Finley
Stutsman	1873	Pembina	Jamestown
Towner	1883	Rolette	Cando
Traill	1875	Grand Forks	Hillsboro
Walsh	1881	Grand Forks	Grafton
Ward	1885	Renville	Minot
Wells	1873	Sheridan	Fessenden
Williams	1890	Mountrail	Williston