Joseph Finnegan may refer to: Joseph Finegan (1814–1885), sometimes Finnegan, American businessman and general Joseph Finnegan (senator) (1898–1962), member of the Massachusetts State Senate from 1930 to 1934, namesake of Senator Joseph Finnegan Park Joseph F. Finnegan (1904–1964), American labor mediator Joseph Finnegan (cryptographer) (1905–1980), American linguist and cryptographer Joseph Finnegan (judge) (1942–2023), judge of the Supreme Court of Ireland