William Haynes
William Haynes is the name of the following people:
- William Haynes (swimmer) , British swimmer
- William Haynes (comedian) (* 1993), American comedian
- William E. Haynes (1829–1914), American politician
- William J. Haynes (* 1958), American lawyer in the Department of Defense
- William Joseph Haynes (* 1949), American lawyer and judge
- William S. Haynes (1864–1939), American silversmith and flute maker
See also:
- William Hayes
- Williams Haynes (1886–1970), American journalist, publisher, and chemical historian
