Sybil Marion Rosenfeld (January 20, 1903, Bayswater, London – October 2, 1996, London) was an English historian of the theatre. She was a winner of the Rose Mary Crawshay Prize (1942), and an Honorary Fellow of King's College London. She is recognised for expanding the scope of academic research in drama from texts to organisation of theatres, biographies of actors, and scene design.