Letter to a Hero
- Release Year
- 1943
- Runtime
- 17m
- Directed By
- Larry O'Reilly

Letter to a Hero is a 1943 American short documentary film produced by Frederic Ullman Jr. A school teacher in Monroe, NY writes a letter to her former student who is fighting in WWII. It was nominated for an Academy Award at the 16th Academy Awards for Best Short Subject, Two-Reel.