Lysaght may refer to:
People John Lysaght, 1st Baron Lisle (1702–1781) John Lysaght, 2nd Baron Lisle (1729–) Edward Lysaght (1763–1811), Irish songwriter Sidney Royse Lysaght (1856–1941), Irish poet John Lysaght (1832–1895), manufacturer of sheet iron Averil Lysaght (1905–1981), New Zealand biologist, science historian and artist Muriel Lysaght (1917–2005), New Zealand landscape architect Sophia Augusta Lysaght (1861-1945), New Zealand artist Cornelius Lysaght (b. 1965), British horse-racing correspondent
Businesses John Lysaght (company), British iron and steel company Lysaght, Australian steel company
Places Mount Lysaght Another spelling of Lysite, Wyoming
See also MacLysaght