Education
Born in Canton, Ohio, Thom attended the public schools. He attended Western Reserve University, Cleveland, Ohio from 1909 to 1911. He was graduated from the law department of Georgetown University, Washington, District of Columbia, in 1916.
Career
He engaged as a newspaper reporter 1905–1909. He served as private secretary to Congressman John Jay Whitacre 1911–1913. He was admitted to the bar in 1917 and commenced practice in Canton, Ohio.
He was an unsuccessful candidate for the Democratic nomination to Congress in 1920.
Thom was elected as a Democrat to the Seventy-third, Seventy-fourth, and Seventy-fifth Congresses (March 4, 1933 – January 3, 1939). He was an unsuccessful candidate for reelection in 1938 to the Seventy-sixth Congress.
He resumed the practice of law. Thom was elected to the Seventy-seventh Congress (January 3, 1941 – January 3, 1943).
He was an unsuccessful candidate for reelection in 1942 to the Seventy-eighth Congress.
Thom was elected to the Seventy-ninth Congress (January 3, 1945 – January 3, 1947). He was an unsuccessful candidate for reelection in 1946 to the Eightieth Congress. He resumed the practice of law.
He served as delegate to the 1956 Democratic National Convention.
He died in Canton, Ohio, August 28, 1960. He was interred in West Lawn Cemetery.
Membership
He served as member of the United States House of Representatives Press Galleries in 1915 and 1916. He served as member of the park commission of Canton 1920–1932.