William McDougall (January 16, 1816 – May 2, 1886) was a shipbuilder, ship owner and political figure in Nova Scotia, Canada. He represented Hants County in the Nova Scotia House of Assembly from 1871 to 1874 as a Liberal-Conservative member. He was the son of Duncan McDougall. McDougall married Sarah O'Brien. He drowned at sea during a voyage between Philadelphia and Havre.