West Columbia, formerly Brookland, is a city and commuter town in the suburban eastern sections of Lexington County, South Carolina, United States. According to the 2010 census, the population was 14,988, and the 2019 population estimate was 17,998. West Columbia is bordered to the east by Columbia, the state capital, across the Congaree River. It is near Columbia's city center or downtown district as well as the South Carolina State House and the Congaree Vista, known locally as "the Vista." The city is bordered to the south by its sister suburb, Cayce. A small portion of the city borders the town of Lexington to the east. West Columbia is part of the greater Columbia, SC metropolitan statistical area.

Lexington County is a county located in the U.S. state of South Carolina. As of the 2020 census, the population was 293,991. Its county seat and largest community is Lexington. The county was chartered in 1785 and was named in commemoration of Lexington, Massachusetts, the site of the Battle of Lexington in the American Revolutionary War. Lexington County is the sixth-most populous county in South Carolina by population and is part of the Columbia, SC Metropolitan Statistical Area. It is located in the Midlands region of South Carolina.