Clayton C. Klein, Jr. (born November 13, 1949) is a former member of the Oregon House of Representatives, representing Central Point, Oregon, and portions of Jackson County, Oregon, United States. He served two terms, from January 1977 through 1980, in the 59th Oregon Legislative Assembly and the 60th (in 1979), as well as a 1980 special session.A Democrat, Clayton Klein was first elected to the Oregon Legislature in November 1976, taking office in January 1977.