By her bequest, Sage donated $2,750,000 posthumously for the development of the Russell Sage Foundation Homes in 1919, a suburban community at Forest Hills Gardens, Queens. In addition she gave extensively to the Rensselaer Polytechnic Institute (RPI) and the Emma Willard School, both in Troy. These contributions included funds donated by Sage that supported major improvements on Rensselaer Polytechnic Institute's campus: construction of the Russell Sage Dining Hall in 1916, named after Sage's nephew who graduated in 1859; and $1,000,000 for the development of Russell Sage Laboratory. This was the base of Rensselaer's Department of Electrical and Mechanical Engineering.