Morton County is a county in the U.S. state of North Dakota. As of the 2020 census, the population was 33,291, and was estimated to be 34,601 in 2025, making it the sixth-most populous county in North Dakota. The county seat and the largest city is Mandan, the eighth-largest city in North Dakota.
- Country
- United States
- Inception
- 1873
- Website
- http://www.co.morton.nd.us
