Graham William Nash, OBE (born 2 February 1942) is a British singer-songwriter known for his light tenor voice and for his songwriting contributions with the British pop group The Hollies, and with the folk-rock super group Crosby, Stills, Nash & Young. A dual citizen of the United Kingdom and United States, Nash became an American citizen on 14 August 1978.

Nash is a photography collector and a published photographer. He was inducted to the Rock and Roll Hall of Fame as a member of Crosby, Stills & Nash in 1997 and as a member of The Hollies in 2010.