The 315th Air Division is an inactive United States Air Force formation. Originally designated the 315th Bombardment Wing, it was activated in July 1944 at Peterson Field, Colorado as a command organization for four very heavy Boeing B-29 Superfortress bombardment groups. It supervised the 16th, 331st, 501st and 502nd Bombardment Groups in the Mariana Islands during the last stages of the Second World War. Its last assignment was with Pacific Air Forces, based at Tachikawa Air Base, Japan, where the division was inactivated in April 1969.

The United States Air Force's 16th Bombardment Group was a very heavy bombardment group that participated in combat in the Pacific Ocean Theater of World War II.