Margaret Rockefeller (September 28, 1915 - March 26, 1996) was a founding member of two land conservation organizations: the Maine Coast Heritage Trust in 1970 and the American Farmland Trust which was formed in 1980 as a national farmland conservation organization. Throughout her life she was a board member of many organizations and raised funds for conservation projects across the United States of America. She died in 1996 at the age of 80 in New York Hospital.