Mitty may refer to:
- Archbishop Mitty High School, a high school in San Jose, California
- John Joseph Mitty, fourth Archbishop of the Archdiocese of San Francisco
- Walter Mitty, a fictional character in James Thurber's short story "The Secret Life of Walter Mitty"
- Joe Mitty, a British salesman and founder of the first Oxfam charity shop in the United Kingdom in 1949
- The Secret Life of Walter Mitty, a short story by James Thurber in 1941
- The Secret Life of Walter Mitty (film), a 1947 comedy film, loosely based on the short story of the same name by James Thurber
- The Secret Life of Walter Mitty (2009 film), an upcoming film being produced by 20th Century Fox, written by Jay Kogen and directed by Mark Waters
- Buck Mitty, a fictional character appearing in the Marvel Comics universe, who was the senior entomology professor at ESU.
- Mitty, Guinea