Douglas Hagar Hilliker (1891–1986) was an American illustrator and painter born in San Francisco.
He studied at the University of California and began his career in commercial and editorial art. His assignments included illustrations for Collier’s and The Saturday Evening Post, as well as work connected with Paramount. Hilliker later became associated with railroad fiction and pulp illustration. His work appeared in Railroad Magazine and in titles such as All-Story Love.
