501st
# 501st

501st may refer to:

## Fiction

* 501st Legion (Star Wars), fictional legion within the Star Wars expanded universe
* 501st Joint Fighter Wing "Strike Witches", a fictional air force unit in the anime series Strike Witches

## Military

* 501st Heavy Panzer Battalion
* 501st Squadron (disambiguation), several units

### United States

* 501st Combat Support Wing
* 501st Infantry Regiment (United States)
* 501st Military Intelligence Battalion (United States)
* 501st Military Intelligence Brigade (United States)
* 501st Sustainment Brigade (United States)
* 501st Aircraft Control and Warning Battalion, a forerunner of the 603rd Air Control Squadron
* 501st Reconnaissance Battalion, a former unit of the 15th Cavalry Regiment
* 501st Bombardment Group, a forerunner of the 501st Combat Support Wing
* 501st Tactical Missile Wing, a former unit of the United States Third Air Force

## Other uses

* 501st Legion, a fan-based organization dedicated to screen-accurate replicas of villain costumes from the Star Wars universe
