John Lysaght may refer to:
John Lysaght, 1st Baron Lisle (1702–1781), Irish peer John Lysaght, 2nd Baron Lisle (1729–1798), Irish peer John Lysaght, 3rd Baron Lisle (1781–1834), Irish peer John Lysaght, 5th Baron Lisle (1811–1898), Irish peer John Lysaght, 7th Baron Lisle (1903–1997), Irish peer
See also John Lysaght and Co. Lysaght (Australian company)