Mountrail County, North Dakota

Mountrail County
Mountrail County Courthouse in Stanley
Mountrail County Courthouse in Stanley
Map of North Dakota highlighting Mountrail County
Location within the U.S. state of North Dakota
Map of the United States highlighting North Dakota
North Dakota's location within the U.S.
Coordinates: 48°12′N 102°22′W / 48.2°N 102.37°W / 48.2; -102.37
Country United States
State North Dakota
FoundedJanuary 4, 1873
1892 (eliminated)
January 29, 1909 (reestablished)
SeatStanley
Largest cityNew Town
Area
 • Total
1,942 sq mi (5,030 km2)
 • Land1,825 sq mi (4,730 km2)
 • Water116 sq mi (300 km2)  6.0%
Population
 (2020)
 • Total
9,809
 • Estimate 
(2023)
9,383 Decrease
 • Density5.1/sq mi (2.0/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional districtAt-large
Websitewww.co.mountrail.nd.us

Mountrail County is a county in the northwestern part of North Dakota, United States. As of the 2020 census, the population was 9,809.[1] Its county seat is Stanley.[2] The county was originally created in 1873, then removed in 1892, annexed by Ward County. It was re-created and organized in 1909.[3][4] 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.[5][6]

  1. ^ "State & County QuickFacts". United States Census Bureau. Retrieved May 9, 2024.
  2. ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
  3. ^ "County History". North Dakota.gov. The State of North Dakota. Archived from the original on February 2, 2015. Retrieved February 1, 2015.
  4. ^ Cite error: The named reference dakota was invoked but never defined (see the help page).
  5. ^ "Our Tribe". MHA Nation. Retrieved June 28, 2024.
  6. ^ "Mountrail County ND". www.nd-direct.com. Retrieved June 28, 2024.