Milligan is a surname of Irish or Scottish origin. It may refer to:
- Alexander William Milligan (1858-1921), Australian ornithologist
- Alice Milligan (1865–1953), Irish nationalist and poet
- Andy Milligan (1929–1991), American playwright, screenwriter, and film director
- Billy Milligan (born 1955), noted sufferer of multiple personality disorder
- Bruno Milligan fictional character
- Deanna Milligan (born 1972), Canadian actress
- Dustin Milligan (born 1985), Canadian film and television actor
- Edward H. Milligan, Quaker historian
- Eric Milligan (politician), Scottish politician
- Frank Milligan (1870–1900), English cricketer
- Hamin Milligan (born 1978), Arena Football League player
- Hanik Milligan (born 1979), American football playere
- John J. Milligan (1795–1875), American lawyer, judge and political figure
- John Colborne Milligan (1867–1941), Ontario lawyer, judge and political figure
- Jocko Milligan, born John Milligan (1861–1923), Major League Baseball player
- John Milligan (baseball) (1904–1972), Major League Baseball player
- Joseph Milligan, member of an American alternative rock band Anberlin
- Keith Milligan (born 1950), Prince Edward Island politician
- Lambdin P. Milligan (1812–1899) Lawyer and Confederate sympathizer
- Lucy Milligan, fictional character
- Luke Milligan (born 1976), a former tennis player from the United Kingdom
- Mark Milligan, Australian footballer
- Maurice M. Milligan (1884–1959), U.S. District Attorney for Western Missouri
- Mike Milligan (born 1967), English former footballer of Irish descent.
- Mike Milligan (coach), former head football coach at the University of Pittsburgh and basketball coach at the University of Tulsa
- Mike Milligan (Canadian politician), current interim leader of the Green Party of New Brunswick
- Owen Milligan, fictional character in the Degrassi series
- Peter Milligan, graphic novelist
- Randy Milligan (born 1961), a former professional baseball player
- Rex Milligan, fictional character
- Robert Milligan (1746–1809), English merchant and ship-owner
- Robert Milligan (Bradford MP) (1786–1862), English politician
- Spencer Milligan (fl. 1970s and 1980s), American actor
- Spike Milligan (1918–2002), comedian, writer and actor
- Stephen Milligan (1948–1994), British politician
- William Milligan (1821–1892), Scottish theologian
- William Rankine Milligan (1898–1971), Scottish politician
Famous quotes containing the word milligan:
“Contraceptives should be used on every conceivable occasion.”
—Spike Milligan (b. 1918)
“You silly twisted boy!”
—Spike Milligan (b. 1918)