Robert McGowan Littlejohn (23 October 1890 – 6 May 1982) was a major general in the United States Army who graduated from the United States Military Academy at West Point, New York, in 1912. He served with the Pancho Villa Expedition and on the Western Front during the First World War, and was Chief Quartermaster for the European Theater of Operations during the Second World War. For this service, he received the Distinguished Service Medal. Upon retirement from the Army in 1946, then President of the United States Harry S. Truman appointed him head of the War Assets Administration.