Lexington is the most populous town in and the county seat of Lexington County, South Carolina, United States. It is a suburb of the state capital, Columbia. The population was 23,568 at the 2020 Census, and it is the second-most populous municipality in the greater Columbia area. The 2022 estimated population is 24,626. According to the Central Midlands Council of Governments, the greater Lexington area had an estimated population of 111,549 in 2020 and is considered the fastest-growing area in the Midlands.