David T. Chastain is an American guitarist, composer and record producer, and owner of Leviathan Records and Diginet Music.

Chastain is a neo-classical, heavy metal, progressive rock, fusion and blues-rock guitarist who emerged in the mid-'80s along with a wave of other neo-classical guitarists. He has released about 50 recordings under multiple names, including David T. Chastain (instrumental jazz-rock fusion style), CJSS, Georgia Blues Dawgs, The Cincinnati Improvisational Group, SPIKE, Zanister, Ruud Cooty and Southern Gentlemen (blues-rock) as well as a number of heavy metal releases under the band name Chastain, accompanied by female vocalist Leather Leone.

In more recent years, David has worked as a record producer at his own company, Leviathan Records. His label specializes in discovering and promoting new talents, specializing in neo-classical guitarists and bands. He also runs Diginet Music, a company specializing in rare, unreleased or out-of-print music.