The 3918th Strategic Wing (3918th SW) is an inactive United States Air Force unit, discontinued on 31 March 1965. The 3918th SW was a ground service support element for the Strategic Air Command 7th Air Division (AD), stationed at RAF Upper Heyford, Oxfordshire, in the United Kingdom. It was upgraded to wing status on 1 February 1964 and discontinued on 31 March 1965. Throughout most of its existence it was controlled by Strategic Air Command, under the 7th Air Division (AD) and stationed at RAF Upper Heyford.