William Lyman may refer to:
William Lyman (politician) (1755–1811), U.S. congressman from Massachusetts William Lyman (inventor) (1821–1891), American inventor of a rotating-wheel can opener William Whittingham Lyman (1850–1921), American winemaker in California William Whittingham Lyman Jr. (1885–1983), American academic and Celtic scholar William Denison Lyman (1852–1920), American author, professor, and historian Link Lyman (William Roy Lyman, 1898–1972), American football player Will Lyman (born 1948), American actor
See also Willy Loman, protagonist of the play Death of a Salesman