Williams County, North Dakota

Williams County
County
Williams County Courthouse
Location within the U.S. state of North Dakota
North Dakota's location within the U.S.
Coordinates: 48°21′N 103°29′W / 48.35°N 103.48°W / 48.35; -103.48
Country	United States
State	North Dakota
Founded	1891
Named for	Erastus Appleman Williams
Seat	Williston
Largest city	Williston
Area
• Total	2,148 sq mi (5,560 km2)
• Land	2,077 sq mi (5,380 km2)
• Water	70 sq mi (200 km2)  3.3%
Population  (2020)
• Total	40,950
• Estimate  (2023)	39,113
• Density	19/sq mi (7.4/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	At-large
Website	www.williamsnd.com

Williams County is located on the western border of the U.S. state of North Dakota, next to Montana. As of the 2020 census, the population was 40,950.^[1] making it the fifth most populous county in North Dakota. Its county seat is Williston.^[2]

The Williston Micropolitan Statistical Area includes all of Williams County. It is bordered on the south by the upper Missouri River, whose confluence with its tributary Yellowstone River is located just east of the border with Montana.