Edmund O'Flaherty (1821– New York, 27 December 1886), also known as William Stuart, was an Irish MP who hurriedly emigrated to the United States in 1854. In New York City he was the business partner of the actor-managers Dion Boucicault and Edwin Booth, and with them leased and managed the Winter Garden Theatre. He managed the New Park Theatre on Broadway from 1874 to 1876.