The 529th Air Defense Group is a disbanded United States Air Force organization. Its last assignment was with the 25th Air Division at Paine Field, Washington. It was inactivated on 18 August 1955. The group was originally activated as a support unit for the 2d Bombardment Group at the end of World War II in Italy and then acted as a depot organization until inactivating in 1946. The group was activated once again in 1953, when ADC established it as the headquarters for a dispersed fighter-interceptor squadron and the medical, maintenance, and administrative squadrons supporting it. It was replaced in 1955 when ADC transferred its mission, equipment, and personnel to the 326th Fighter Group in a project that replaced air defense groups commanding fighter squadrons with fighter groups with