John Cowper Powys (born October 8, 1872, Shirley, Derbyshire, England—died June 17, 1963, Blaenau Ffestiniog, Merioneth, Wales) was a Welsh novelist, essayist, and poet, known chiefly for his long panoramic novels, including Wolf Solent (1929), A Glastonbury Romance (1932), and Owen Glendower (1940). He was the brother of the authors T.F. Powys and Llewelyn Powys.
Educated at Sherborne School and the University of Cambridge, Powys was a university extension lecturer for about 40 years, 30 of them in the United States. His works include a striking Autobiography (1934) and books of essays, among them The Meaning of Culture (1930), The Pleasures of Literature (1938), and The Art of Growing Old (1943).