Fred Donald Marion (born January 2, 1959), is an American former professional football player who was a safety for 10 seasons with the New England Patriots of the National Football League (NFL) during the 1980s and 1990s.

Marion played college football for the Miami Hurricanes, and was recognized as an All-American.

He attended the University of Miami in Coral Gables, Florida, where he played for the Hurricanes from 1978 to 1981.

He was a Pro Bowl selection in 1985 when he intercepted seven passes for 189 return yards, helping the Patriots to their first Super Bowl appearance versus the Chicago Bears.

He intercepted Bubby Brister and ran back a 37-yard score.