Joseph Finnegan

Joseph Finnegan may refer to:
 * Joseph Finegan (1814–1885), sometimes Finnegan, American businessman and general
 * Joseph Finnegan (judge) (1942–2023), judge of the Supreme Court of Ireland
 * Joseph Finnegan (cryptographer) (1905–1980), American linguist and cryptographer
 * Joseph F. Finnegan (1904–1964), American labor mediator