William Griffith
William Griffith may refer to:
Politicians
- William Griffith (born 1480), Welsh politician
- William Griffith (MP fl.1586), MP for Caernarvon Boroughs (UK Parliament constituency)
- William Griffith (MP fl.1597), MP for Caernarvonshire (UK Parliament constituency)
- William Griffith (1620–1688), Welsh Member of Parliament for Caernarvon (UK Parliament constituency)
- William Griffith (1686–1715), Welsh Member of Parliament for Caernarvon and Caernarvonshire
- William Griffith (US politician), see United States House of Representatives elections, 2006
- William B. Griffith, American attorney and orator
Sports
- William "Billy" Griffith, Australian rules footballer
- William Griffith (canoeist), Canadian canoeist
- William Griffith (cricketer), South African cricketer
- Stewart Cathie "Billy" Griffith, English cricketer
Others
- William Griffith (New Jersey attorney), briefly served as a United States federal judge
- William Griffith (astronomer), Californian amateur astronomer
- William Griffith (botanist)
- William Henry Jackson "Bill" Griffith, American cartoonist
- William Griffith (murderer), a participant in the Marais des Cygnes massacre, for which he was later executed
- William Pettit Griffith, English architect and antiquarian