Sinton is a surname. Notable people with the surname include:
Andy Sinton (born 1966), English footballer and manager David Sinton, Irish born industrialist in Ohio David Sinton Ingalls, American politician, great-grandson of David Sinton John Alexander Sinton, Irish soldier and winner of the Victoria Cross (first cousin once-removed of Maynard Sinton) John Sinton (1835–1890), Irish-linen manufacturer; younger brother of Thomas Sinton, grandfather of John Alexander Sinton Les Sinton, English footballer Maynard Sinton, son of Thomas Sinton Nell Sinton (1910–1997), American painter Thomas Sinton, Irish linen industrialist (cousin of David Sinton), great-uncle of John Alexander Sinton