Marcia Lucas (née Griffin) is an American film editor. She met George Lucas when Verna Fields hired her to work as an assistant editor to George while editing US Information Agency documentaries, and they were married between 1969 and 1983. They adopted one daughter, Amanda, who was born in 1981.
Marcia was a co-editor on A New Hope and Return of the Jedi (with some uncredited work on The Empire Strikes Back as well). She won an Academy Award for her work on A New Hope, which was shared with Paul Hirsch and Richard Chew.