Cator is a surname. Notable people with the surname include:
John Cator (1728–1806), British timber merchant and landowner
Geoffrey Edmund Cator (1884–1973), British civil servant
Harry Cator (1894–1966), English recipient of the Victoria Cross
Rhonda Cator (born 1966), retired female badminton player from Australia
Silvio Cator (1900–1952), Haitian athlete