William Horwood

• William Horwood (composer), English composer and musician
• William Horwood (police commissioner), Commissioner of the Metropolitan Police
• William Horwood (novelist), English novelist
• William Horwood (by 1504-57 or later), MP for Huntingdon (UK Parliament constituency)
• William Whorwood or Horwood, Solicitor General, Attorney General and MP for Downton
• William Horwood (Chief Justice), Politician and Chief Justice of Newfoundland