Marvin M. "Vinny" Giles III (born January 4, 1943) is an American amateur golfer. He is best known for winning both the U.S. Amateur and the British Amateur. Giles was born in Lynchburg, Virginia. He graduated from the University of Georgia in 1966, where he was a three-time All-American on the golf team. He also graduated from the University of Virginia Law School in 1969. Giles served on the Executive Committee of the Virginia State Golf Association for over 20 years, and then was first an Associate Director and then a Director of the Southern Golf Association for three years.