Mungalalu Truscott Airbase or Truscott-Mungalalu Airport (IATA: TTX, ICAO: YTST), which during World War II was known as Truscott Airfield (or usually just simply referred to as Truscott) is today a commercial airport in the remote Kimberley region of Western Australia.

Mungalalu Truscott is about 281 nautical miles (520 km; 323 mi) west-southwest of Darwin and 333 NM (617 km; 383 mi) northeast of Broome. Located on the Anjo Peninsula in the far north Kimberley district of Western Australia. Mungalalu Truscott occupies 46 km2 (18 sq mi) of Aboriginal land.

The airbase falls under the traditional custodianship of the Wunambal Gaambera people, who use the traditional name for the area: Mungalalu. The base is managed by Mungalalu Truscott Airbase Pty Ltd (MT Airbase) and has been registered with the Civil Aviation Safety Authority as a commercial air base since April 2005. MT Airbase manages the Mungalalu Truscott Base under an agreement with the Wunambal Gaambera Aboriginal Corporation (WGAC). Agreement has been reached with WGAC to sub lease the airfield and base area with licences for access to certain roads and areas of coastline until 2042.