William Melville Martin (August 23, 1876 – June 22, 1970) served as the second premier of Saskatchewan from 1916 to 1922. In 1916, although not a member of the Legislative Assembly of Saskatchewan, Martin was elected leader of the Saskatchewan Liberal Party, succeeding Premier Walter Scott and thus became Premier of Saskatchewan. Prior to entering provincial politics, Martin had been a member of the federal Parliament for two terms, as a member of the Liberal Party of Canada.