Roy Walter Riehlman (August 26, 1899 – July 16, 1978) was a member of the United States House of Representatives from New York.
R. Walter Riehlman was born in Otisco, New York on August 26, 1899. He was raised in Tully, graduated from Manlius Military Academy in 1919 and Central City Business School of Syracuse in 1921.
Riehlman operated a general store and served as Postmaster of Nedrow from 1921 to 1923. In 1923 he returned to Tully and became owner a commercial baking company, Tully Bakery.
From 1933 to 1938, Riehlman was a member of the Tully Board of Education. In 1934 he was elected Chairman of Tully's Republican Committee. He was elected to the Onondaga County Board of Supervisors in 1937 and served from 1938 to 1943. From 1943 to 1946 he was Onondaga County Clerk.
Riehlman was also active in civic affairs and several local businesses, including serving on the advisory board of the Marine Midland Trust Company and the area board of directors of Virginia's Lynchburg College.
In 1946 he was elected to Congress as a Republican. He was reelected eight times and served from January 3, 1947 to January 3, 1965, the 80th through 88th Congresses. In 1952 Riehlman was one of the Republicans who visited Dwight D. Eisenhower, then commander of the North Atlantic Treaty Organization, to ask him to consider running for President. As a senior member of the Committee on Science and Technology, he was an advocate of the U.S. space program.