Francis Marion Campbell (born May 25, 1929) is a former American football defensive lineman and coach. Campbell played college football for the Georgia Bulldogs from 1949 until 1951, where he was appropriately nicknamed "Swamp Fox". During his National Football league (NFL) playing career, Campbell played for the San Francisco 49ers (1954-1955) and the Philadelphia Eagles (1956-1961), winning Pro Bowl honors in 1959 and 1960 and also being named 1st team All-Pro in 1960 as part of the Eagles' championship team that year. He was one of the last of the NFL's "two-way" players who played all offensive and defensive snaps in a game.

Campbell was head coach of both the Atlanta Falcons (twice) and Philadelphia Eagles as well as the defensive coordinator for each team separate from his times as their head coach. He also served as defensive line coach for the Boston Patriots (1962-1963), Minnesota Vikings (1964-1966), and the Los Angeles Rams (1967-1968). He was an expert in the 3-4 defense; his Philadelphia Eagles defenses ranked first in the league in points allowed in 1980 and 1981, and second and first in yards allowed in those same years. Campbell has the third lowest winning percentage among head coaches who have coached more than three seasons in the NFL. The only coaches behind him are Bert Bell and David Shula. Campbell spent 1993 season as the defensive coordinator for his alma mater Georgia Bulldogs.