Cloyd Heck Marvin (August 22, 1889 – April 27, 1969) was the longest serving president of George Washington University, from 1927 to 1959, and the then-youngest American university president from 1922–7 at the University of Arizona. He was a freemason.
Marvin graduated from Riverside High School and studied at Stanford University for two years from 1909 to 1911. He gained degrees from the University of Southern California (A.B.,1915), Harvard University (A.M, 1917, PhD 1920), and the University of New Mexico (honorary L.L.D., 1923). He was a Phi Delta Kappa member. He taught at the University of Southern California as Associate Professor of Commerce and then at the University of Arizona. He was dean at University of California at Los Angeles for three years.
Marvin became president of the University of Arizona in 1922, at 32 being the youngest American university president. Choosing between building a student union building and a new library in 1924, he chose the latter (now the North Building of the Arizona State Museum). He resigned along with four members of the Board of Regents on January 19, 1927. The American Association of University Professors had criticised Marvin's presidency for the removal of three faculty members, and when one of the ousted men was elected to the Board of Regents, removing his majority on the board, he resigned.
He was elected to succeed William Mather Lewis as President of George Washington University in June 1927 and took office that September. He established a School of Government at the George Washington University in 1928 using $1 million donated by the Supreme Council of the Scottish Rite Masons, Southern Jurisdiction, a Masonic lodge.