Charles L. Bagby (1903-1975) was a chess master and San Francisco lawyer. He won the Mechanics' Institute Chess Club championship in 1923. He was elected to the Board of Trustees of the Mechanics’ Institute (Chess Club) in 1940. He served longer than any Trustee in the history of the Institute. He won the Northern California Championship in 1949 and 1950. He won the California championship in 1958.