Burleigh County, North Dakota Burleigh County, North Dakota Burleigh County is a county located in the U.S. state of North Dakota. As of the 2010 census, the population was 81,308, making it the second-most populous county in North Dakota. Its county seat is Bismarck, the state capital. The county was created on January 4, 1873 and later organized on July 16. Burleigh County is included in the Bismarck, ND Metropolitan Statistical Area, commonly called "Bismarck–Mandan". According to the U.S. Census Bureau, the county has a total area of , of which is land and (2.1%) is water. As of the 2010 census, there were
North Dakota State Capitol State Historical Society of North Dakota moved into the new North Dakota Heritage Center and in 1968, the North Dakota Department of Transportation occupied the building designed to provide it more office space. The Transportation Building is the last constructed on the campus to date, although a Judicial Wing was added onto the base of the capitol tower between 1977 and 1981. While the space needed by state government has increased since the original construction of the Capitol in the 1930s, the state's population has decreased. The state capitol grounds has six buildings: the capitol building, the Department of Transportation