Donald Chaffey (5 August 1917 – 13 November 1990) was a British film director, writer, producer, and art director.

Chaffey's film career began as an art director in 1947, and his directorial debut was in 1953. He remained active in the industry until his death in 1990 from heart failure. His film Charley One-Eye (1973) was entered into the 24th Berlin International Film Festival.

He is chiefly remembered for his fantasy films, which include Jason and the Argonauts (1963), The Three Lives of Thomasina (1963), One Million Years B.C. (1966), The Viking Queen (1967), Creatures the World Forgot (1971), Pete's Dragon (1977), and C.H.O.M.P.S. (1979), his final feature film.

Concurrent with his theatrically released films, Chaffey directed episodes of numerous British television series, including multiple installments of Danger Man, The Prisoner, and The Avengers. From the 1980s until his death, all of his work was in American made-for-TV movies, and in such TV series as Fantasy Island, Stingray, MacGyver, Vega$, T. J. Hooker, Matt Houston, and Charlie's Angels.

Chaffey began his career in the art department of Gainsborough Pictures where he worked as a draftsman on Madonna of the Seven Moons (1945), The Rake's Progress (1945), and Caravan (1946). He was art director of The Adventures of Dusty Bates (1947) and The Little Ballerina (1948). He directed the documentary shorts Thames Tideway (1948) and Cape Cargoes (1948).

Chaffey directed the short features The Mysterious Poacher (1950) and The Case of the Missing Scene (1950). He returned to the art department for King of the Underworld (1950), The Stolen Plans (1952), Murder at the Grange (1952), Murder at Scotland Yard (1952), and Black 13 (1953).

Chaffey resumed his directing career with the family film Skid Kids (1953). He made the short Watch Out (1953), then did Strange Stories (1953), Bouncer Breaks Up (1953, a short), The Mask (1952), and A Good Pull Up (1953).

Chaffey directed Time Is My Enemy (1954). After the short Dead on Time (1955) he made The Secret Tent (1956), The Flesh Is Weak (1957) and The Girl in the Picture (1957).

He directed episodes of TV series like Theatre Royal, The Adventures of the Big Man, Chevron Hall of Stars, The Errol Flynn Theatre, Assignment Foreign Legion, The Adventures of Robin Hood, Dial 999, and The New Adventures of Charlie Chan. He interspersed these with features like A Question of Adultery (1958), The Man Upstairs (1958), Danger Within (1959), Dentist in the Chair (1960), Lies My Father Told Me (1960), and Nearly a Nasty Accident (1961).