Karl Johannes Terras (9 September 1890 Vaivara Parish (now part of Narva-Jõesuu), Kreis Wierland – 25 February 1942 Kirov Oblast) was an Estonian politician. He was a member of VI Riigikogu (its National Council). In 1916 he graduated St. Petersburg University in law speciality. 1920–1940 he was State Secretary of Estonia. He was also active in Estonian sport life. Between 1934–1940, he was the chairman of Estonian Sport Central Union (Estonian: Eesti Spordi Keskliit).