John Cowley may refer to: John Cowley (cartographer), 18th-century mathematician and Royal mapmaker to King George II of Great Britain John Cowley (entomologist) (1909–1967), English entomologist John Cowley (British Army officer) (1905–1993), British Army general John Cowley (racing driver), racing driver who competed at the Bathurst 12 Hour John Cowley (actor) (1923–1998), Irish actor John Duncan Cowley (1897–1944), librarian and author John Lodge Cowley (1719–1787), English cartographer, geologist and mathematician John M. Cowley (1923–2004), professor at Arizona State University John Cowley (cricketer) (1885–1957), English cricketer