William Harrigan (March 27, 1894 – February 1, 1966) was an American actor who played standard roles in Hollywood during the 1930s and 1940s. He originated the role of the captain in the Broadway hit Mister Roberts. Harrigan was the son of actor Edward Harrigan and the grandson of composer David Braham. Harrigan was also the brother-in-law of director/playwright Joshua Logan. He was born in New York City.