Graham Nash (born 2 February, 1942) is a British singer-songwriter.

Nash was born in Blackpool, England, during World War II, and in the early 1960s was a leading member of The Hollies, one of the UK's most successful pop groups ever. Although recognised as a key member of the group, he seldom sang lead vocals.

In 1968, after a visit to the USA at which he had been introduced to David Crosby in Laurel Canyon and had begun experimenting with drugs, Nash left the Hollies at the height of their fame, to form a new group with Crosby and Stephen Stills, Crosby, Stills & Nash. With them, he went on to even greater worldwide success.

In 1979, Nash cofounded Musicians United for Safe Energy.