The 501st Combat Support Wing is an administrative support wing of the United States Air Force, based at RAF Alconbury, United Kingdom. It is one of three wings located in the United Kingdom as components of the Third Air Force and United States Air Forces in Europe – Air Forces Africa (USAFE).

The Third Air Force (Air Forces Europe) (3 AF) is a numbered air force of the United States Air Forces in Europe - Air Forces Africa (USAFE-AFAFRICA). Its headquarters is Ramstein Air Base, Germany. It is responsible for all U.S. air forces in Europe and Africa, and operations and support activities in the U.S. European Command and U.S. Africa Command's areas of responsibility. It also has a unique mission as the U.S. military's primary liaison to the British government, which is conducted through the command's 3 AF-UK headquarters at RAF Mildenhall, England.