Kelly Field Annex (formerly Kelly Air Force Base) (IATA: SKF, ICAO: KSKF, FAA LID: SKF) is a United States Air Force facility located in San Antonio, Texas. In 2001, pursuant to BRAC action, the former Kelly AFB runway and land west of the runway became "Kelly Field Annex" and control of this reduced size installation was transferred to the adjacent Lackland Air Force Base, part of Joint Base San Antonio. The base is under the jurisdiction of the 802d Mission Support Group, Air Education and Training Command (AETC).

Kelly Field was one of thirty-two Air Service training camps established after the United States entry into World War I, being established on 27 March 1917. It was used as a flying field; primary flying school; school for adjutants, supply officers, engineers; mechanics school, and as an aviation general supply depot.

Kelly Air Force Base and its associated San Antonio Air Logistics Center of the Air Force Material Command (formerly Air Force Logistics Command) was closed as an independent installation and its assets realigned by the 1995 Base Realignment and Closure Commission IV Commission.