Gary Sullivan (born June 24, 1982, in West Islip, New York) is an American soccer defender who plays for the Long Island Rough Riders.
He spent one season with the Colorado Rapids in Major League Soccer.
Sullivan attended West Islip High School where he was a four-year varsity letterman.
He was again a first-team all-ASC selection in 2003, and was a nominee for the Hermann Trophy, Which is the award to the best college player in the country.
He left the team in 2005 to return to college and play with the Rough Riders in the USL Second Division.