Finnigan is a surname, a variant of Finnegan. Notable people with the surname include:
Annette Finnigan (1873–1940), American suffragette and philanthropist Brian Finnigan, founder of the house of Finnigans Charles Finnigan, surgeon, rear-admiral and dental surgeon in the United Kingdom's Royal Navy Eddie Finnigan, ice hockey player Frank Finnigan, ice hockey player Jennifer Finnigan, Canadian actress Mike Finnigan (1945–2021), American rock keyboardist and singer Robert E. Finnigan, American scientist
Fictional characters Seamus Finnigan, a character in the Harry Potter series
See also Finnigan Sinister, one half of the 2000 AD hitman duo Sinister Dexter Finnigan Fox, an upcoming video game for the Intellivision Amico Finnegan (disambiguation)