Bismarck is the capital of the U.S. state of North Dakota and the county seat of Burleigh County. It is the second-most populous city in North Dakota after Fargo. The city's population was estimated in 2018 at 73,112, while its metropolitan population was 132,678. In 2017, 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.