Jason Truby (born June 1, 1973) is an American guitarist. He began his career in 1989 with Living Sacrifice as lead guitarist. He was also a member of P.O.D., but has also performed with Phil Keaggy, David Beegle, Ashley Cleveland and her husband Kenny Greenberg, and was a guest performer with Phil Keaggy's band Glass Harp at the First Annual Denver Guitar Festival.

In 1989, Truby joined Living Sacrifice with the other members being Bruce Fitzhugh, DJ Johnson, and Lance Garvin.

In 1991, Living Sacrifice's self-titled debut was released on R.E.X. Records. In 1992, Living Sacrifice released their second album, Nonexistent.

In 1994, the band released a third album, Inhabit Living Sacrifice signed onto Solid State Records seeking to widen their audience. In 1995, Johnson left the band and was replaced by Truby's older brother, Chris.

Living Sacrifice recorded Reborn, their Solid State debut, in 1997. The band started to play a mix of groove metal and metalcore. Reborn is considered the most influential of all Living Sacrifice records. In 1998, both Truby brothers left the band and were eventually replaced by Rocky Gray and Arthur Green.

In 2003, P.O.D. lacked a guitarist after former band member Marcos Curiel parted with the band amidst controversy. Truby was available at the time and wrote and recorded the band's single, "Sleeping Awake", for The Matrix Reloaded Soundtrack album. He became a full-time member soon afterward.

The band released its first album with Truby, Payable on Death, in November 2003. It was the first time the band discarded its rap metal style, which sparked much controversy. Despite the new style, the album has sold over one million copies worldwide.

Truby also wrote the song "Truly Amazing" with P.O.D. for The Passion of the Christ: Songs album, which won a GMA Dove Award.