Martin Dies, Jr. (November 5, 1900 – November 14, 1972) was a
Texas politician and a
Democratic member of the
United States House of Representatives. He was elected as a Democrat to the Seventy-second and after that to the six succeeding
Congresses (March 4, 1931 – January 3, 1945). In 1944, Dies did not seek renomination to the Seventy-ninth Congress, but was elected to the Eighty-third and to the two succeeding Congresses (January 3, 1953 – January 3, 1959). Again, he did not seek renomination in 1958 to the Eighty-sixth Congress. In 1941 and 1957, he was twice defeated for the nomination to fill a vacancy in the
United States Senate. Dies served as the first chairman of the
Special Committee to Investigate Un-American Activities (Seventy-fifth through Seventy-eighth Congresses).