Timothy Treadwell
- Birthday: 1957-04-29
- Deathday: 2003-10-06
- Place of birth: Long Island, New York, USA
- Also know as: Timothy Dexter
Timothy Treadwell (born Timothy William Dexter; April 29, 1957 – October 5, 2003) was an American bear enthusiast, environmentalist, and documentary filmmaker and founder of the bear-protection organization Grizzly People.
