Halligan is a surname of Irish origin, deriving from Irish Ó hAilechain or Ó hAleagain. Bearers include:
Bob Halligan, Jr., US Christian rock musician
Brendan Halligan, Irish economist and politician
Brian Halligan, CEO of HubSpot
Caitlin Halligan, US lawyer and judicial nominee
Danny Halligan, New Zealand soccer player
Daryl Halligan, New Zealand rugby league player
Dick Halligan, US jazz-rock musician
James Halligan (1778–1806), an Irishman hanged for murder in America
James Reginald Halligan (1894–1968), Australian public servant
Jim Halligan, US politician
Jocko Halligan, US baseball player
John Halligan (ice hockey), US ice hockey executive
John Halligan, Jr., US Navy admiral
Johnny Halligan, Scottish footballer
Liam Halligan, UK economist and journalist
Marion Halligan, Australian writer
Ray Halligan, Australian politician
Ursula Halligan, Irish broadcaster
