John Harmon may refer to: John Harmon (actor) (1905–1985), American actor John Harmon (attorney) (born 1944), United States Assistant Attorney General under President Jimmy Carter John Harmon (coach), Boston University basketball and football coach John Harmon (character), a character in Our Mutual Friend John Harmon (Wisconsin politician) (1845–1921), American lumberman and politician. John H. Harmon (1819–1888), mayor of Detroit and publisher of the Detroit Free Press John T. W. Harmon, Liberian-American bishop of the Episcopal Diocese of Arkansas