Haig is a surname, and may refer to:
- Al Haig, jazz musician
- Alan Haig-Brown, Canadian novelist
- Alexander Haig, (1924–2010), U.S. Army general, White House Chief of Staff and U.S. Secretary of State
- Alexander Haig, Viscount Dawick, heir to 2nd Earl Haig
- Brian Haig (born 1953), novelist, son of General Alexander Haig
- David Haig, British actor
- David Haig (biologist), Australian biologist
- Derek Haig, a fictional character in Degrassi: The Next Generation
- Douglas Haig (actor), child actor in silent and sound films
- Douglas Haig, 1st Earl Haig, senior British commander during World War I
- George Haig, 2nd Earl Haig, soldier and artist
- Georgina Haig, Australian actress
- Jack Haig, British actor
- John Thomas Haig, Canadian politician
- Ned Haig, rugby union player
- Nigel Haig, British cricketer
- Paul Haig, British musician
- Richard Haig, Welsh footballer
- Roderick Haig-Brown, Canadian writer and conservationist
- Shirley Haig, New Zealand hockey player
- Sid Haig, American actor
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