Graham William Nash OBE (born 2 February 1942) is an English-American musician, singer, songwriter, photographer, and activist. 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 and a published photographer. 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 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.