Thrash is a surname. Notable people with the surname include:
Ben Thrash (1897–1966), American diver Dox Thrash (1893–1965), American artist Jamari Thrash (born 2000), American football player James Thrash (born 1975), American football player Jesse Thrash (1880–1942), American football player Maggie Thrash, American writer Thomas W. Thrash Jr. (born 1951), American judge Tom Thrash, American college football player William G. Thrash (1916–2011), United States Marine Corps general