Calvin Dean Johnson (November 22, 1898 – October 13, 1985) was a U.S. Representative from Illinois Born in Fordsville, Kentucky, Johnson moved with his parents to St. Clair County, Illinois, in 1904, and attended public schools. He engaged in the general contracting business from 1922 to 1944. He served as member of the St. Clair County School Board from 1926 to 1928. He served as member of the St. Clair County, Illinois, Board of Supervisors from 1930 to 1934. He served in the Illinois House of Representatives from 1935 to 1941.