Air Chief Marshal Sir Allan Grant "Angus" Houston, (born 9 June 1947) is a retired senior officer of the Royal Australian Air Force.
He served as Chief of Air Force from 20 June 2001 and then as the Chief of the Defence Force from 4 July 2005.
He retired from the military on 3 July 2011.
Since then Houston has been appointed to a number of positions, including chairman of Airservices Australia.
In March 2014 he was appointed to head the Joint Agency Coordination Centre during the search for Malaysia Airlines Flight 370, and in the Australia Day Honours of 2015, he was knighted for this service.