John Metcalfe may refer to: John Metcalfe (composer), British-based composer and violist John Metcalfe (writer) (1891–1965), British science fiction and horror writer Jack Metcalfe (1912–1994), Australian athlete John Metcalfe (footballer) (born 1935), English former professional footballer John Metcalfe (librarian), Australian librarian (1901–1982) John Francis Metcalfe (1908–1975), British Army general