Sandra Dorne (born Joan Smith; 19 June 1924 – 25 December 1992) was a British actress.

As a platinum blonde, she was a regular female lead in B-films in the late 1940s and early 1950s.

Film roles dried up as she grew older, but she still found work and acted mainly in British television, appearing in such series as Z-Cars, The Avengers and The Third Man.

She also starred in Five Go Mad in Dorset, the first episode of the Comic Strip Presents... series broadcast on the opening night of Channel 4 in 1982.

Married to the actor Patrick Holt from 1954 until her death, Dorne died on 25 December 1992 at Paddington Community Hospital, Westminster, London.