Cornelia Warren (March 21, 1857 – June 4, 1921) was an American farmer and an educational and social service philanthropist, widely known for her investment in social improvement projects. She was a trustee of Wellesley College, bought the location for Denison House and ran a model farm in Waltham, Massachusetts. She bequeathed her large estate to establish trust funds for maintaining hospitals, educational facilities, community projects and cultural venues in and around Boston, Massachusetts and Westbrook, Maine. She left Cedar Hill, the Warren family home and over 200 acres of land, to her brothers, if they wanted to live there, and if not, to the community. She assigned 2 trustees, one of whom was the famous landscape architect, Arthur Shurleff, to decide how her wishes for Cedar Hill w