West Columbia 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. It is a part of the greater Columbia, SC metropolitan statistical area.West Columbia lies west of Columbia, South Carolina, directly 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."West Columbia is bordered to the south by its sister suburb, Cayce, South Carolina.