William Farish may refer to:
William Farish (chemist) (1759–1837), tutor at the University of Cambridge William Stamps Farish I (1843–1899) William Stamps Farish II (1881–1942), Standard Oil president William Stamps Farish III (born 1939), American businessman William S. Farish IV (born c. 1963), American businessman William G. Farish, American politician in the Virginia House of Delegates