Columbus Municipal Airport (IATA: CLU, ICAO: KBAK, FAA LID: BAK) is three miles north of Columbus, in Bartholomew County, Indiana, United States.

[2] The airport is on the site of the former World War II Atterbury Army Airfield, a U.S. Army Air Forces facility, and Bakalar Air Force Base, a Cold War-era U.S. Air Force installation utilized primarily by the Air Force Reserve.

[3] Columbus Municipal Airport covers 2,000 acres (810 ha) at an elevation of 656 feet (200 m).

[1] In 2005 the airport had 39,155 aircraft operations, average 107 per day: 91% general aviation and 9% military.

In 2015, 77 aircraft were based at the airport: 58 single-engine, 8 multi-engine, 7 jet, 2 helicopter, 1 glider and 1 ultra-light.