USAF (disambiguation)

USAF usually refers to the United States Air Force, the aerial warfare branch of the U.S. Armed Forces.

USAF may also refer to:
 * United States Armed Forces itself, the military of the United States of America
 * United Student Aid Funds, a nonprofit corporation that works to enhance postsecondary-education preparedness, access and success
 * Upper Saint Anthony Falls, part of the Saint Anthony Falls
 * Jane's USAF, a 1999 video game
 * A common typo for UASF or "User Activated Soft Fork", a technique for updating Bitcoin and other blockchains