Mountrail County is a county in the northwestern part of North Dakota, United States. As of the 2020 census, the population was 9,809. Its county seat is Stanley. The county was originally created in 1873, then removed in 1892, annexed by Ward County. It was re-created and organized in 1909. The county is home to the headquarters of the Three Affiliated …
Mountrail County is a county in the northwestern part of North Dakota, United States. As of the 2020 census, the population was 9,809. Its county seat is Stanley. The county was originally created in 1873, then removed in 1892, annexed by Ward County. It was re-created and organized in 1909. The county is home to the headquarters of the Three Affiliated Tribes of the Mandan, Hidatsa, and Arikara people, and a large part of the county belongs to the tribe's Fort Berthold reservation.
Country: United States
State: North Dakota
Founded: January 4, 1873 · 1892 (eliminated) · January 29, 1909 (reestablished)
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