John Hackett
John Hackett may refer to:
- Sir John Winthrop Hackett, Irish-born Australian newspaper man and politician
- Sir John Hackett (British Army officer), Australian-born British soldier and author
- John Hackett (Irish politician), Member of Parliament for Mid Tipperary, 1910–1918
- John Hackett (musician), British musician
- John Hackett (Wisconsin politician), American businessman and politician
- John K. Hackett, New York judge and politician
- John Thomas Hackett, Canadian lawyer
- John Francis Hackett, American prelate of the Roman Catholic Church