(Arthur William) Douglas Cooper, (20 February 1911 – 1 April 1984) was a British art historian, art critic and art collector.
Cooper mainly collected Cubist works. During World War II he worked first as an interrogator and subsequently as an investigator of the trade in stolen artworks.
After the war, Cooper and his partner, the renowned biographer John Richardson, bought a chateau in Provence and converted it into a gallery of early cubist art. There Cooper lived the life of a connoisseur collector, and made use of his personal acquaintance of artists–most notably Picasso and Leger– to write monographs on contemporary artists.