The capital of South Dakota is Pierre, and its located in the central part of the state overlooking the Missouri River. Pierre has an area of about 13 square miles. As of 2010, the population of Pierre was over 13,600.
South Dakota is located in the Midwest region of the United States. It has a total area of about 77,000 square miles, making it the 17th largest state. South Dakota is 380 miles long and 210 miles wide. The state is bordered by North Dakota, Iowa, Minnesota, Nebraska, Wyoming and Montana. As of 2013, South Dakota had a population exceeding 840,000.