Robert Gray Army Airfield[1] (IATA: GRK, ICAO: KGRK, FAA LID: GRK) is a military joint-use airport that operates alongside Killeen Regional Airport.

[2] The airport is based inside the south end of the Fort Hood Military Reservation (West Fort Hood), six nautical miles (7 mi, 11 km) southwest of the central business district of Killeen, Texas,[2] in unincorporated Bell County.

[5] The base was named after a Killeen native who was a pilot of a B-25 bomber on the famous Doolittle Raid on Tokyo in 1942.

[6] The airport has one runway designated 15/33 with a PEM (Porous European Mix) surface measuring 10,000 by 200 feet (3,048 x 61 m).

For the 12-month period ending April 10, 2010, the airport had 12,208 aircraft operations, an average of 33 per day: 98.5% scheduled commercial and 1.5% general aviation.