Elementary Schools 0 Mattaponi Elementary Posted by adminPosted 6 years ago June 5, 2018 Basic Info Mattaponi Elementary is located at 11701 Duley Station Road, Upper Marlboro, MD 20772. The principal is Stephen I. Green, Jr.. Mattaponi Elementary 0 Inclusiveness 0.0/10 Staffing and resources 0.0/10 Cooperation 0.0/10 Communication 0.0/10 Academic expectations 0.0/10 School Info School Website