William Willis
William Willis may refer to:
Politicians
- William Willis (Maine politician), American politician and historian, mayor of Portland, Maine, 1857
- William Willis Garth, American politician
- William Willis (British politician), British politician, MP for Colchester 1880–1885
- William Jarvis Willis, New Zealand politician
- William Nicholas Willis, Australian politician
Others
- William [Downes Willis], British clergyman, theologian and author
- William Willis (physician), British physician
- William Willis (inventor), British inventor
- William Willis (sailor), rafter and adventurer
- William Hailey Willis, American classicist
- William S. Willis, ethnohistorian and pioneer in African American anthropology
- William Willis (artist), American artist