South Dakota spending, because of the proximity of many tourist attractions in the Black Hills and Ellsworth Air Force Base. The next eight largest cities in the state, in order of descending 2010 population, are Aberdeen (26,091), Brookings (22,056), Watertown (21,482), Mitchell (15,254), Yankton (14,454), Pierre (13,646), Huron (12,592), and Vermillion (10,571). Pierre is the state capital, and Brookings and Vermillion are the locations of the state's two largest universities (South Dakota State University and University of South Dakota, respectively). With a population of about 14,000, Pierre is the second smallest state capital in the United States. Of the ten largest cities
South Dakota Highway 13 intersection with U.S. Route 14 (US 14). SD 13 was formerly a segment of SD 11. This was changed to SD 13 between 1932 and 1935. At that time, its original northern terminus was extended eastward to its current location at US 14 north of Elkton. This was due to a rerouting of US 14 in the early 1930s. South Dakota Highway 13 South Dakota Highway 13 (SD 13) is a state highway in the east-central part of the U.S. state of South Dakota. It connects Flandreau with Elkton. SD 13 was originally part of SD 11's path. SD 13