The 831st Bombardment Squadron was a squadron of the United States Army Air Forces. It was activated in 1942 as the 516th Bombardment Squadron and flew antisubmarine missions off the Atlantic coast as the 11th Antisubmarine Squadron. Later, it saw combat in the Mediterranean Theater of Operations as a Consolidated B-24 Liberator unit, where it earned a Distinguished Unit Citation during the strategic bombing campaign against Germany. Following V-E Day, the squadron returned to the United States and was inactivated at Sioux City Army Air Base, Iowa on 20 August 1945.