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, and was estimated to be 41,767 in 2025, making it the fifth-most populous county in North Dakota. The county seat and the largest city is Williston.
- Country
- United States
- Inception
- 1891
- Website
- http://www.williamsnd.com
