397th
# 397th

397th may refer to:

* 397th Bombardment Squadron, inactive United States Air Force unit
* 397th Bombardment Wing, inactive United States Air Force unit, last assigned to the 45th Air Division of Strategic Air Command
* 397th Engineer Battalion (United States), construction battalion of the United States Army based in Eau Claire, Wisconsin
* 397th Fighter Squadron, inactive United States Air Force unit
