 According to the U.S. Census Bureau, the city has a total area of 15.2 square miles (39.4 km2), of which 15.2 square miles (39.3 km2) is land and 0.04 square mile (0.1 km2) (0.26%) is water.Columbiana is a municipal corporation organized under the laws of the State of Alabama.The city is southeast of Birmingham.