Robert Mueller Municipal Airport (IATA: AUS, ICAO: KAUS, FAA LID: AUS) (1930–1999, "Miller") was the first civilian airport built in Austin, Texas, United States. It was located a few miles northeast of downtown Austin. It was replaced as Greater Austin's main airport by the Austin–Bergstrom International Airport, which is located on the site of the former Bergstrom Air Force Base. The airport was named after Robert Mueller, a city commissioner who died in office in January 1927. Robert Mueller Municipal Airport was identified with the airport code AUS, which was reassigned to Austin–Bergstrom International Airport in 1999.