Tennyson Guyer (November 29, 1912 – April 12, 1981) was a member of the United States House of Representatives. He was a Republican from Ohio.
Born in Findlay, Ohio, Guyer was educated in the public schools of Findlay, and performed at a young age with the Hagenbeck-Wallace Circus. He received a B.S. from Findlay College in 1934, and afterwards became an ordained minister. Guyer served as mayor of Celina, Ohio, from 1940 to 1944, and later became a member of the state central committee from 1954 to 1966.
Guyer was the public affairs director for Cooper Tire & Rubber Co. in Findlay from 1950 to 1972, and was a member of the Ohio State Senate from 1959 to 1972. He was also a delegate to the Ohio State Republican conventions each year from 1950 to 1957, and was a delegate to the Republican National Convention in 1956.
He was elected as a Republican to the Ninety-third and to the four succeeding Congresses, serving Ohio's District 4 in the United States House of Representatives, and served from January 3, 1973, until his death from a heart attack on April 12, 1981, in Alexandria, Virginia. While serving as Congressman in 1979, he led the Cocaine Task Force, committed to curbing the drug's use in the USA. He was interred in Maple Grove Cemetery in his hometown of Findlay, Ohio, and was survived by his wife Edith Mae (Reuter) Guyer, daughters Sharon Guyer and Rose Benedict, son-in-law Richard Benedict and granddaughter Jennifer Benedict.