Calvin H. Frazier (February 16, 1915 – September 23, 1972) was an American Detroit blues and country blues guitarist, singer and songwriter. Despite leaving a fragmented recording history, both as a singer and guitarist, Frazier was an associate of Robert Johnson, and recorded alongside Johnny Shines, Sampson Pittman, T.J. Fowler, Alberta Adams, Jimmy Milner, Baby Boy Warren, Boogie Woogie Red, and latterly Washboard Willie. His early work was recorded by the Library of Congress (now preserved by the National Recording Registry) prior to the outbreak of World War II, although his more commercial period took place between 1949 and 1956.