Graham William Nash (born 2 February 1942) is a British and American musician, singer and songwriter. He is known for his light tenor voice and for his contributions as a member of the Hollies and Crosby, Stills & Nash.

Nash is a photography collector, a published photographer, and digital image printing pioneer. He was inducted into 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. He was appointed an Officer of the Order of the British Empire (OBE) in the 2010 Birthday Honours List for services to music and to charity.

Nash holds four honorary doctorates, including one from the New York Institute of Technology, one in music from the University of Salford in 2011 and one in fine arts from Lesley University in Cambridge, Massachusetts.