John Allen Hannah (born April 4, 1951), nicknamed Hog, is a former American football left guard who played for the New England Patriots (1973–1985) in the National Football League (NFL).
In 1999 the Sporting News ranked him as the second greatest offensive lineman in NFL history after Anthony Muñoz.
He was elected to the Pro Football Hall of Fame in 1991, and the College Football Hall of Fame in 1999.
Sports Illustrated dubbed him, on its August 3, 1981, cover, "The Best Offensive Lineman of All Time." In 1991, he was the inaugural inductee in the New England Patriots Hall of Fame.