Flanigan is an Irish surname, alternatively spelt Flanagan, Flanigen and Flannigan. Notable people with the surname include:
People Allen Flanigan (born 2001), American basketball player Daniel M. Flanigan (1883-1946), American politician Joe Flanigan, American actor Peter Flanigan (1923–2013), American investment banker
Fictional characters Thomas Flanigan, character in the 1990 film King of New York
See also Flanigan, Nevada, United States, named after businessman Patrick L. Flanigan