William Henry
William Henry is the name of the following people:
- William Henry (Politician, 1729) (1729–1786), American politician (Pennsylvania)
- William Henry, Duke of Gloucester and Edinburgh (1743–1805), member of the British royal family
- William Henry (chemist) (1774–1836) English chemist
- William Henry (Politician, 1788) (1788–1861), American politician (Vermont)
- William Henry (swimmer) (1859–1928), English swimmer and water polo player
- William Henry (actor) (1914–1982), American actor
- William Henry (film editor) , American film editor
- William Alexander Henry (1816–1888), Canadian politician and lawyer
- William Thomas Henry (1872–1952), Canadian politician