The word thief typically refers to someone or something that performs theft, a crime against property. It can also mean:
- Thief (video game)
- Thief (movie), a 1981 film
- thief (character class), a common role-playing game character class
- thief knot, a type of knot
- The Thief of Bagdad, a 1924 film
- To Catch a Thief, a 1955 film
- Hail to the Thief, an album by Radiohead
- The Tale of the Body Thief, a novel by Anne Rice
- The Bicycle Thief, a 1948 film