(November 5, 1901 – 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 from 1937 through 1944 (Seventy-fifth through Seventy-eighth Congresses).