McGahey is a surname. Notable people with the surname include: Charlie McGahey (1871–1935), English cricketer Harrison McGahey (born 1995), English footballer Jeanne McGahey, American poet John McGahey (born 1960), irish Gaelic player Mick McGahey (1925–1999), Scottish miner and Communist Susan McGahey (1862–1919), Irish-born Australian matron of Royal Prince Alfred Hospital