Derek Elphinstone (1913–1999) was a British actor.

Derek Elphinstone was born on 15 October 1913 in Surrey.^[1] He was the son of Montague Elphinstone was also an actor and from a family of actors. Montague Elphinstone served in the Boer War and the First World War, rising to the rank of Major.^[2] In 1912, Montague Elphinstone married Norah Hume, but he died in a flying accident in 1917.^[2]

Derek Elphinstone died in February 1999 in East Sussex.^[1]

• The Four Feathers (1939) as Lieutenant Parker
• Sailors Three (1940) as British Observer
• In Which We Serve (1942) as No 1
• Distant Trumpet (1952) as Richard Anthony
• Secret People (1952) as Plain Clothes Man

• The Witness for the Prosecution (1949), as Sir Wilfrid Robarts in a BBC adaptation of Agatha Christie's play