Jason Adam Griffith (born November 29, 1980) is an American actor and voice actor who has worked for 4Kids Entertainment, NYAV Post and DuArt Film and Video. He is also credited as J. Griff, Adam Caroleson, and DJ Tanner. He is best known as the voice of SEGA mascot Sonic the Hedgehog, voicing him and Shadow the Hedgehog in Sonic X, in Sonic the Hedgehog video games from 2005 to 2010, as well as Jet the Hawk in the Sonic Riders game series. Griffith is also known for voicing characters including Tom Majors in Chaotic, Miyamoto Usagi in Teenage Mutant Ninja Turtles, Bongo the Monkey in Danimals commercials, and appearing in the 2015 kids television show, Super Wings, as Bello. He was also a promo announcer for 4Kids TV, The CW4Kids and Toonzai.

He was the English voice of Masurao in FLCL Progressive.