Columbia is the capital and second-largest city of the U.S. state of South Carolina, with a population estimate of 131,674 as of 2019. The city serves as the county seat of Richland County, and a portion of the city extends into neighboring Lexington County. It is the center of the Columbia metropolitan statistical area, which had a population of 767,598 as of the 2010 United States Census, growing to 832,666 by July 1, 2018, according to 2018 U.S. Census estimates. This makes it the 70th-largest metropolitan statistical area in the nation, as estimated by the United States Census Bureau as of July 1, 2018. The name Columbia is a poetic term used for the United States, derived from the name of Christopher Columbus, who explored for the Spanish Crown. Columbia is often abbreviated as Cola, leading to its nickname as "Soda City."
The city is located about 13 miles northwest of the geographic center of South Carolina, and is the primary city of the Midlands region of the state. It lies at the confluence of the Saluda River and the Broad River, which merge at Columbia to form the Congaree River.