Hartigan is a surname. Notable people with the surname include:
Bernie Hartigan (born 1944), hurler
Brent Hartigan (born 1985), football player
Chad Hartigan (born 1982), filmmaker and actor
Charles Conway Hartigan (1882–1944), Medal of Honor recipient
David James Hartigan (1887–unknown), politician
Gerald Hartigan (1884–1955), South African cricketer
Grace Hartigan (1922–2008), painter
Henry Hartigan (1826–1886), Victoria Cross recipient
James Hartigan (born 1975), journalist and broadcaster
Joan Hartigan (1912–2000), tennis player
John Hartigan, fictional character
John Patrick Hartigan (1887–1968), jurist
Mark Hartigan (born 1977), ice hockey player
Mercy Hartigan, fictional character
Neil Hartigan (born 1938), politician
Pamela Hartigan, businesswoman
Pat Hartigan (actor) (1881–1951), actor and director
Pat Hartigan (born 1950), hurler
Patrick Joseph Hartigan (1878–1952), priest
Roger Hartigan (1879–1958), cricketer