The 21st Expeditionary Mobility Task Force (21 EMTF) was one of two EMTFs assigned to the Air Force's Air Mobility Command. It was headquartered at Joint Base McGuire-Dix-Lakehurst, New Jersey. The 21 EMTF was a redesignation of Twenty-First Air Force, effective 1 October 2003. The 21 EMTF reported to Headquarters, Eighteenth Air Force at Scott Air Force Base, Illinois. The 21 EMTF was inactivated on 19 March 2012.