Gary Dunn (born August 24, 1953) is a former professional football player American football defensive tackle for 12 seasons for the Pittsburgh Steelers.

Dunn was drafted by the Pittsburgh Steelers in 1976 following a stellar career at the University of Miami. He was a mainstay on the vaunted Steelers' defense for 12 seasons, serving as team captain four years. The two-time Super Bowl champion is ranked ninth in the Steelers' all-time sacks list, having taken down such legendary Hall of Fame quarterbacks as Joe Namath, Bob Griese and Jim Kelly.