The 540th Aircraft Control and Warning Group is an inactive United States Air Force unit. It was assigned to the 32d Air Division, stationed at Stewart Air Force Base, New York. It was inactivated on 6 February 1952. This command and control organization activated on 16 February 1953, and was responsible for the organization, manning and equipping of new Aircraft Control and Warning (Radar) units. It was dissolved after about a year, with the units being assigned directly to the 32d AD.