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is a city in Maury County, Tennessee, United States. The population was 33,983 at the 2007 census. It is the county seat of Maury County.
The town is notable for being the self-proclaimed "Mule capital of the world" and honors this fact with Mule Day, a large celebration held annually every April. Columbia is also the home of the national headquarters for the Sons of Confederate Veterans.
Columbia is located at (35.615022, -87.044464). It is nestled along the banks of the Duck River at the southern edge of the Nashville Basin with the higher elevated ridges of the Highland Rim located to the south and west of the city.
According to the United States Census Bureau, the city has a total area of 29.6 square miles (76.7 km²), of which, 29.6 square miles (76.7 km²) of it is land and 0.03% is water.