William Williamson
William Williamson is the name of the following people:
- William Williamson (zoologist) (1869–1950) British zoologist
- William Williamson (politician) (1875–1972), American politician (South Dakota)
- William Williamson (Canoeist) (1915–1991) Canadian canoeist
- William Crawford Williamson (1816–1895), English naturalist and paleobotanist
- William D. Williamson (1779–1846), American politician
