John Maguire may refer to: John Maguire (archbishop of Glasgow) (1851–1920), Scottish Roman Catholic prelate John Maguire (coadjutor archbishop of New York) (1904–1989), American Roman Catholic prelate John Maguire (cricketer) (born 1956), Australian cricketer John Maguire (fighter) (born 1983), English mixed martial artist John Maguire (Irish politician) (died 1872), Irish politician John Maguire (Irish senator), Irish senator John Maguire (rugby league), Australian former rugby league footballer John A. Maguire (1870–1939), American politician John M. Maguire, CEO of Friendly's Jack Maguire (1925–2001), American baseball player