John Hackett may refer to:
Sir John Winthrop Hackett (1848–1916), Irish-born Australian newspaper man and politician Sir John Hackett (British Army officer) (John Winthrop Hackett, 1910–1997), Australian-born British soldier and author John Hackett (Irish politician) (1865–1940), Member of Parliament for Mid Tipperary, 1910–1918 John Hackett (musician) (born 1955), British musician John Hackett (Wisconsin politician) (1808–1886), American businessman and politician John K. Hackett (1821–1879), New York judge and politician John Thomas Hackett (1884–1956), Canadian lawyer John Francis Hackett (1911–1990), American prelate of the Roman Catholic Church John Hackett (1930-2020), American actor
See also John Hacket (1592–1670), English churchman, Bishop of Lichfield and Coventry 1661–1670 John-Baptist Hackett (died 1676), Irish theologian