The 4730th Air Defense Group is a discontinued United States Air Force organization. Its last assignment was with the New York Air Defense Sector at McGuire Air Force Base, New Jersey, where it was discontinued in 1959. The group was formed to provide a single command and support organization for the two fighter interceptor squadrons of Air Defense Command (ADC), that were tenants at McGuire, a Military Air Transport Service (MATS) base. It was also assigned a maintenance squadron to perform aircraft maintenance. It was discontinued when the 332d Fighter-Interceptor Squadron moved in 1959, leaving only a single fighter squadron at McGuire.