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