Spillett is a surname. Notable people with the surname include:
Brian Spillett (1937–1965), English George Cross recipient Hubert W. Spillett, British Baptist missionary Peter Spillett (1926–2004), British-born Australian historian and public servant Simon Spillett (born 1974), English jazz saxophonist Tasha Spillett-Sumner, Canadian author and educator
See also Electoral division of Spillett, Northern Territory, Australia