Hugh Seymour Walpole (1884 - 1941) was an English novelist.

He was born in Auckland in New Zealand and studied at Emmanuel College, Cambridge in England. He worked as a teacher before turning to writing full time. His first novel was The Wooden Horse (1909), with Fortitude (1913) his first great success. He worked for the Red Cross in Russia during World War I, experiences which fed his The Dark Forest (1916) and The Secret City (1919).

His best known work is the family saga The Herries Chronicle, comprising Rogue Herries (1930), Judith Paris (1931), The Fortress (1932) and Vanessa (1933). Farthing Hall (1929) was produced in collaboration with J.B. Priestley.

Walpole's work was very popular, and brought him great financial rewards. He was a prolific worker who embraced a variety of genres, including school stories (Mr Perrin and Mr Traill, 1911 and the Jeremy books), horror (Portrait of a Man with Red Hair, 1925), short stories, plays, biographies (of Joseph Conrad in 1916, James Branch Cabell in 1920 and Anthony Trollope in 1928) and the screenplay for the George Cukor-directed David Copperfield (1935). He was knighted in 1937.