John Prosky (born 1962) is an American film, theatre, and television actor.
Prosky's numerous TV credits include NYPD Blue, ER, Heroes, Criminal Minds, True Blood, JAG, My So-Called Life, ', The Practice, The X-Files, The West Wing, Charmed, 24, House, Grey's Anatomy, Veronica Mars, Just Shoot Me!, Fringe, and the web series Red Bird. His film credits include The Nutty Professor, Bowfinger, and A.I. Artificial Intelligence. Prosky also contributed voice work to the L.A. Noire video game.
Prosky is the son of actor Robert Prosky. He has been married to actress Kimiko Gelman since 2000.