Elementary Schools 0 Adelphi Elementary Posted by adminPosted 6 years ago June 5, 2018 Basic Info Adelphi Elementary is located at 8820 Riggs Road, Adelphi, MD 20783. The principal is Chelsea Hill. Adelphi 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