Columbia is a city in and the county seat of Maury County, Tennessee, United States. The population was 34,681 at the 2010 census and in 2013 the population was 35,558.The "Mule capital of the world," Columbia annually celebrates the city-designated Mule Day each April. Columbia and Maury County are acknowledged as the "Antebellum Homes Capital of Tennessee", with more pre-Civil War homes than any other county in the state. Columbia is also the home of the national headquarters for the Sons of Confederate Veterans. Columbia is home to one of the last two surviving residences of the 11th President of the United States, James Knox Polk, the other being the White House.