Joseph Dunsmore Monteith (June 2, 1865 – January 8, 1934) was an Ontario MLA for Perth North from 1923 to 1934. He was treasurer from 1926 to 1930 and Minister of Labour, Public Works and Highways from 1930 to 1934. Monteith, a physician born near Stratford, was the son of Andrew Monteith. He was educated in Stratford and studied medicine at Trinity College, Toronto. In 1895, he married Alice Mary Chowen. He served as mayor of Stratford from 1917 to 1918. Monteith defeated Francis Wellington Hay to win the seat in the provincial assembly in 1923. He died in office in 1934.