Hennigan is a surname of Irish origin, with the name being most common in Mayo and Sligo counties. Notable people with the surname include:
Adrian Hennigan, British film critic Brian Hennigan, British novelist, producer and director Charlie Hennigan (1935–2017), American football player Gavan Hennigan (born 1981), Irish extreme environment athlete Gilbert Franklin Hennigan (1883–1960), American politician from Louisiana James W. Hennigan Jr. (1927–2020), American lawyer and politician from Massachusetts James W. Hennigan Sr. (1890–1969), American businessman and politician from Massachusetts John Hennigan (politician), Irish politician and farmer John Hennigan (poker player) (born 1970), American professional poker player from Philadelphia, Pennsylvania John Morrison (wrestler), (born John Hennigan, 1979), American former professional wrestler Maura Hennigan (born 1952), the Clerk Magistrate of the Suffolk County, Massachusetts Superior Court Criminal/Business Division Mike Hennigan (footballer) (born 1942), English former professional football player and manager Mike Hennigan (American football) (born 1951), American football player and coach Phil Hennigan (1946–2016), right-handed former Major League Baseball pitcher Rob Hennigan (born 1982), American basketball executive and former general manager of the Orlando Magic
In popular culture Hennigan's Scotch, a fictional brand of Scotch whisky introduced in the Seinfeld episode "The Red Dot"
See also Morgan v. Hennigan, the case that defined the school busing controversy in Boston, Massachusetts during the 1970s
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