The 66th Fighter Wing (66 FW) is a disbanded unit of the United States Air Force, last stationed at Chicago Municipal Airport, Illinois. It was withdrawn from the Illinois Air National Guard (IL ANG) and inactivated on 31 October 1950.This wing is not related to the United States Air Force 66th Tactical Reconnaissance Wing or subsequent units that was constituted on 15 November 1952 and activated on 1 January 1953.