Stutsman County is a county in the U.S. state of North Dakota. As of the 2020 census, the population was 21,593, making it the 8th most populous county in North Dakota. Its county seat is Jamestown.

Jamestown is a city in Stutsman County, North Dakota, United States. It is the county seat of Stutsman County. The population was 15,849 at the 2020 census, making it the ninth most populous city in North Dakota. Jamestown was founded in 1883 and is home to the University of Jamestown.