Terry O'Quinn wurde am 15 Juli 1952 in Sault Ste. Marie, Michigan, USA geboren. Er ist Schauspieler, bekannt für Lost (2004), Kill, Daddy, Kill! (1987) und Rocketeer (1991). Er war mit Lori O'Quinn verheiratet.
Is one of the few cast members of Lost (2004) who did not have to
audition, because his former collaborator (from Alias: Die Agentin (2001)) J.J. Abrams thought of O'Quinn for the part of Locke before the actor was even offered it.