William Underwood may refer to:
People
edit- A. W. Underwood (1855–?), American man purported to have pyrokinetic abilities
- William Lyman Underwood (1864–1929), American photographer
- William D. Underwood, American university president
- William Underwood (cricketer) (1852–1914), English cricketer
Other uses
edit- William Underwood Company, American food company