The 30th Troop Carrier Squadron is an inactive United States Air Force unit. It was established in January 1942 as the 30th Transport Squadron and served as a training unit for I Troop Carrier Command until disbanding in a general reorganization of Army Air Forces training units in 1944. The squadron was reconstituted in the reserves in 1949 and served until May 1951, when it was called to active duty for the Korean War. It was then inactivated, and its personnel were assigned to other units.