• Sir John Winthrop Hackett (1848–1916), Irish-born Australian newspaper man and politician
• General Sir John Hackett (British Army officer) (1910–1997), Australian-born British soldier and author
• John Hackett (musician)
  John Hackett (musician)
  John Hackett is a British flautist, the younger brother of guitarist Steve Hackett. Although his primary instrument is the flute, he also plays guitar, bass and keyboards...
  
  , British musician
• John Hackett (Irish politician), Member of Parliament for Mid Tipperary
  Mid Tipperary (UK Parliament constituency)
  Mid Tipperary was a UK Parliament constituency in Ireland, returning one Member of Parliament 1885–1922.This constituency comprised the central part of County Tipperary. Prior to the 1885 general election the area was part of the Tipperary...
  
  , 1910–1918
• John K. Hackett
  John K. Hackett
  John Keteltas Hackett was an American lawyer and politician from New York.-Life:...
  
   (1821-1879), New York judge and politician

See also

• John Hacket
  John Hacket
  John Hacket was an English churchman, Bishop of Lichfield and Coventry from 1661 until his death.-Life:He was born in London and educated at Westminster and Trinity College, Cambridge. On taking his degree he was elected a fellow of his college, and soon afterwards wrote the comedy, Loiola , which...
  
   (1592–1670), English churchman, Bishop of Lichfield and Coventry from 1661 until his death
• John-Baptist Hackett
  John-Baptist Hackett
  John-Baptist Hackett , Irish theologian, died 1676.-Biography:Hackett was born at Fethard, co. Tipperary, Ireland, and was educated in the Dominican convent at Cashel, where he became a member of that order....
  
  , Irish theologian