Margaret Jane Blye (October 24, 1942 – March 24, 2016) was an American actress, also sometimes billed as Margaret Bly. Early in her career, she appeared in a number of popular television series including Perry Mason, Gunsmoke and Ben Casey. Blye starred in the 1967 Paul Newman film Hombre and the 1969 version of The Italian Job, as well as Waterhole #3, a Western starring James Coburn. Blye appeared with Coburn again in the 1975 Charles Bronson film Hard Times. Byle also starred in the horror film The Entity (1981).

Her later television roles included The Rockford Files, Hart to Hart and Lois & Clark: The New Adventures of Superman. She appeared in four episodes of the series In the Heat of the Night, including the pilot episode. Blye appeared in several films in the 2000s, including 2004's The Last Goodbye and the 2005 horror comedy The Gingerdead Man.