| County | Date Formed | Parent County | County Seat | Contact |
| Adams | 1907 | Hettinger | Hettinger, 1907 - present |  |
| Barnes | 1873 as Burbank, named changed to Barnes in 1875 | Cass | Valley City, 1879 - present | Michelle Savre |
| Benson | 1879 | Ramsey | Minnewaukan, 1884 - present | Colleen Goltz |
| Billings | 1879 | Unorganized territory | Medora, 1886 - present | |
| Bottineau | 1873 | Unorganized territory | Bottineau, 1884 - present | Christina Palmer and Jane Colmenares |
| Bowman | 1883 | Billings | Bowman, 1907 - present | |
| Burke | 1910 | Ward | Bowbells, 1910 - present | Robert Hill |
| Burleigh | 1873 | Buffalo (Discontinued) | Bismarck, 1873 - present | |
| Cass | 1873 | Original County | Fargo, 1883 - present | Michelle Savre |
| Cavalier | 1873 | Pembina | Langdon, 1884 - present | Roger Olson |
| Dickey | 1881 | LaMoure, Ransom, and unorganized territory | Ellendale, 1882 - present | Char Kibbie |
| Divide | 1910 | Williams | Crosby, 1910 - present | Robert Hill |
| Dunn | 1883 annexed to Stark in 1897 reformed in 1908 |
1883 - Howard (Discontinued) 1908 - Stark, Mercer |
Manning, 1908 - present | Terri Godlevsky |
| Eddy | 1885 | Foster | New Rockford, 1885 - present | George Barron |
| Emmons | 1879 | Unorganized territory | Williamsport, 1883-1899 Linton, 1899 - present |
Mike Peterson |
| Foster | 1873 | Pembina | Carrington, 1883 - present | George Barron |
| Golden Valley | 1912 | Billings | Beach, 1912 - present | Allison Wyrick |
| Grand Forks | 1873 | Pembina | Grand Forks, 1875 - present | Tom Williams |
| Grant | 1916 | Morton | Carson, 1916 - present | Beth Rau |
| Griggs | 1881 | Foster, Burbank, Traill | Hope, 1882 Cooperstown, 1882 - present |
Sandi Bohle |
| Hettinger | 1883 | Stark | Mott, 1881 - present | <Colleen Pustola |
| Kidder | 1873 | Buffalo (Discontinued) | Steele, 1881 - present | George Barron |
| La Moure | 1873 | Pembina | Grand Rapids, 1881 - 1886 La Moure, 1886 - present |
Char Kibbie |
| Logan | 1873 | Buffalo (Discontinued) | Napolean, 1884-1889 King, 1889 Napolean, 1899 - present |
Char Kibbie |
| McHenry | 1873 | Buffalo (Discontinued) | Villard, 1884-1885 Scriptown, 1885-1886 Towner1886 - present |
Michael P. Borchardt |
| McIntosh | 1883 | Logan | Hoskins, 1884-1888 Ashley, 1888 - present |
Joy Fisher |
| McKenzie | 1883 eliminated 1891 present county formed 1905 |
1883 - Howard (Discontinued) 1905 - Billings, Stark (comprising the unorganized counties of Allred, Old McKenzie & Wallace) |
Alexander, 1905-1907 Schafer, 1907-1941 Watford City, 1941 - present |
Philip J. Smith |
| McLean | 1883 | Stevens | Washburn, 1883 - present | Vivian Merkel |
| Mercer | 1875 | Original territory | Stanton, 1884 - present | Linda Ziemann |
| Morton | 1873 | Original territory | Lincoln, 1878-1879 Mandan, 1881 - present |
|
| Mountrail | 1873 eliminated 1891 re-established 1909 |
Ward | Stanley, 1909 - present | |
| Nelson | 1883 | Foster, Grand Forks | Lakota, 1883 - present | Mary Lindbo |
| Oliver | 1885 | Mercer | Sanger (Raymond), 1885 - 1902 Center, 1902 - present |
|
| Pembina | 1867 | Indian Lands (Dakota) | Pembina, 1867-1911 Cavalier, 1911-present |
Pam Furstenau |
| Pierce | 1887 | Rugby, 1889 - present | |
|
| Ramsey | 1873 | Pembina | Devil's Lake, 1883 - present | |
| Ransom | 1873 | Pembina | Lisbon, 1881 - present | Michelle Savre |
| Renville | 1873 eliminated in 1891 1910 |
1873 - Buffalo, Dakota Territory 1910 - Ward |
Mohall, 1910 - present | John Stafney |
| Richland | 1873 | Original county | Wahpeton (Chahinkapa), 1873 - present | Pat Maas |
| Rolette | 1873 | Buffalo (Discontinued) | Dunseith, 1884-1885 St. John, 1885-1889 Rolla, 1889 - present |
Mary Lindbo |
| Sargent | 1883 | Ransom | Milnor, 1883-1886 Forman, 1886 - present |
Char Kibbie |
| Sheridan | 1908 | McLean | McClusky, 1908 - present | Ted Poppke |
| Sioux | 1914 | Standing Rock Reservation | Fort Yates, 1914 - present | |
| Slope | 1915 | Billings | Amidon, 1915 - present | Allison Wyrick |
| Stark | 1879 | Unorganized territory | Dickinson, 1883 - present | Theresa Ragsdale |
| Steele | 1883 | Griggs, Traill | Hope, 1883-1885 Sherbrooke, 1885-1919 Finley, 1919 - present |
Kathleen Castillo |
| Stutsman | 1873 | Pembina | Jamestown, 1873 - present | George Barron |
| Towner | 1883 | Rolette, Cavalier | Cando, 1884 - present | Mary Lindbo |
| Traill | 1875 | Grand Forks, Burbank, Cass | Caledonia, 1875 - 1891 Hillsboro, 1891 - present |
Mike Peterson |
| Walsh | 1881 | Grand Forks | Grafton, 1881 - present | Larry Reski |
| Ward | 1885 | Renville | Burlington, 1885-1888 Minot, 1888 - present |
Cindy Duhamel |
| Wells | 1873 (as Gingras (Jennegra), named changed to Wells in 1881) | Sheridan | Sykeston, 1884-1894 Fessenden, 1894 - present |
George Barron |
| Williams | 1891 | Buford, Flannery | Williston, 1891 - present | Frank Lysy |
See what counties existed in 1888, 1895, and 1910.
Information verified on the DiscoverND -- County History page, from data provided by Holly Timm from Everton's Handy Book, and from the CCs for the counties.
