Columbia is a city in and the county seat of Maury County, Tennessee. The population was 41,690 as of the 2020 United States census. Columbia is included in the Nashville metropolitan area. The self-proclaimed "mule capital of the world," Columbia celebrates the city-designated Mule Day each April. Columbia and Maury County are acknowledged as the "Antebellum Homes Capital of Tennessee"; the county has more antebellum houses than any other county in the state.