Bismarck is the capital of the U.S. state of North Dakota and the county seat of Burleigh County. It is the state's second-most populous city, after Fargo. The population was 73,622 at the 2020 census, and was estimated to be 75,092 in 2023, while its metropolitan population was 133,626. In 2020, Forbes magazine ranked Bismarck as the seventh fastest-growing small city in the United States. Bismarck was founded by European-Americans in 1872 on the east bank of the Missouri River.