After his parents' divorce, Patricia moved her sons to the suburb of Richfield, where Jason attended St. Richards Catholic Elementary, a private grade school.

In his early acting career, he appeared in over 75 commercials, and in 1995 landed the role of Tyler Baker in the racy Showtime comedy series Sherman Oaks.

Since Roswell, Behr has taken on a variety of roles in independent films such as: Unsu Lee's Happily, Even After;[1] Jefery Levy's Man of God, and Rebecca Cook's Shooting Livien.

In 2001 he played Dennis Buggit in Lasse Hallstrom's The Shipping News, co-starring with Kevin Spacey, Judi Dench, Julianne Moore, and Cate Blanchett.

He made a guest appearance in Buffy the Vampire Slayer in 1998, and was later reunited with leading actress Sarah Michelle Gellar in the hit Japanese/American film collaboration The Grudge.

Jason is in good company with fellow castmates who include, Jane Alexander, Julia Ormond, Peter Strauss, Will Patton, and Andrew McCarthy.

Senseless unfolds as an affluent business man (Jason Behr) finds himself the unwilling hostage to political extremists who brutally torture him for acts he has no recollection of ever committing.

[2]Audiences of blood-thirsty home viewers fixate on their computer screens as his torment is streamed across the internet and delivers the most graphic and disturbing reality show ever to be broadcast.Behr starred in the thriller The Tattooist, which cast him as a tattoo artist who becomes fascinated by the Samoan tatau tradition, but his desire to learn the ancient skill brings him into conflict and danger with the island mysticism and a deadly spirit is released as a result.