Usa-Places.com has listed approx 17 Non-profit organizations in Washington. Some of the Top rated Non-profit organizations in Washington are- United States Institute of Peace, United States Institute of Peace, Pan American Health Organization/World Health Organization, The Aspen Institute, U.S. Green Building Council, U.S. Green Building Council, Habitat for Humanity of Washington D.C., National Trust for Historic Preservation, National Trust for Historic Preservation & KIPP Foundation - DC Office.