Henry O'Leary (May 13, 1832 – November 7, 1897) was an Irish-born businessman and political figure in New Brunswick, Canada. He represented Kent County in the Legislative Assembly of New Brunswick from 1873 to 1878. After his death, control of the business passed to his sons Richard and Frederick. His son Henry Joseph became an archbishop and his son Louis James became a bishop in the Catholic Church. His daughter Christina married George Valentine McInerney.