Gwen Nelson (30 June 1901 – 15 October 1990) was an English actress who was a member of the Royal Shakespeare Company and the Royal Court Theatre Company.
Born as Gwendoline Alexandra Nelson in Muswell Hill, London, she originally intended to be a singer, and made her West End musical debut in Tough at the Top at the Adelphi Theatre in July 1949. She went on to act in Eleanor Farjeon's The Silver Curlew at London's Arts Theatre (1949), And So To Bed at the New Theatre (1951), Oh, My Papa at the Garrick Theatre (1957), Virtue in Danger (1963), All in Love at The May Fair Theatre (1964), and Saved at the Royal Court Theatre (1965). In 1976 she appeared in a revival of Arnold Ridley's The Ghost Train at the Old Vic Theatre in London with Wilfrid Brambell, James Villiers, Geoffrey Davies, Allan Cuthbertson and Judy Buxton. In 1981 she acted in Rose by Andrew Davies at the Richmond Theatre in Surrey with Honor Blackman and Hilda Braid.