William Gardner
William or Bill Gardner may refer to:
Sport
- Bill Gardner (baseball), American baseball player
- Bill Gardner (football hooligan), English football supporter, former football hooligan and co-author of books on football hooliganism
- Bill Gardner (footballer), English professional footballer
- Bill Gardner (ice hockey), retired ice hockey player
- Billy Gardner, retired American baseball player
- "Wee" Willie Gardner, American basketball player for the Harlem Globetrotters
- William Jennings Gardner, American football player and member of Eliot Ness's "Untouchables"
Military
- William Gardner (sailor), American Civil War sailor and Medal of Honor recipient
- William Gardner (VC), Scottish recipient of the Victoria Cross
- William Linnæus Gardner, Indian officer
- William M. Gardner, Confederate States Army brigadier general
Others
- Bill Gardner (author), American author
- Bill Gardner (politician), secretary of state for New Hampshire
- William Biscombe Gardner, English painter and wood-engraver
- William E. Gardner Jr., president of Savannah State College
- William Gardner (Australian settler), pioneer and historian
- William Gardner (coin designer), English coin designer, engraver, calligrapher and writer
- William Gardner (former slave), freedman who had been a slave of U.S. President James Madison
- William Gardner (Massachusetts judge), justice of the Massachusetts Supreme Judicial Court
- William Gardner (surgeon), practised in South Australia and Victoria
- William Gardner, a 17-year-old African American boy killed in August 2024 by Baltimore Police Department officers
- William Gardner, pseudonym of Peter Hope
- William James Gardner, British missionary in Jamaica
- Willie Gardner, Scottish rock musician