John Harper may refer to:
Arts and entertainment John Harper (actor) (died 1742), English comic actor John Harper (architect) (1809–1842), English architect J. Russell Harper (1914–1983), Canadian art historian John Harper (fl. 1998–2007), director of the Royal School of Church Music Johnny Harper, fictional character in The O.C.
Law and politics John Adams Harper (1779–1816), American politician from New Hampshire John Harper (mayor) (1825–1874), American politician in Colorado John Harper (Kentucky politician) (1930–2001), American politician from Kentucky John Joseph Harper (1951–1988), Canadian aboriginal leader in Manitoba
Sports John Harper (footballer) (1883–?), Scottish footballer John Harper (baseball) (), American Negro league baseball player John Harper (linebacker, born 1946), Canadian football player John Harper (linebacker, born 1960), American football player John Harper (bowls) (fl. 1982), Scottish lawn and indoor bowler John Harper Jr. (born 2003), Japanese basketball player.
Others John Harper (administrator) (1851–1932), Australian railways commissioner John Harper (pastor) (1872–1912), British Baptist pastor John Ernest Harper (1874–1949), British admiral John William Harper (1916–1944), British army soldier John L. Harper (1925–2009), British biologist John Harper (computer engineer) (born 1937), British computer scientist John Dixon Harper (fl. 1963–1975), American executive at Alcoa
See also Jack Harper (disambiguation) Jon Harper (born 1978), British musician