DE 9 runs between farmland to the north and housing developments to the south prior to turning north onto Thomas Corner Road. The road curves northeast as Silver Run Road through agricultural areas before entering marshland and crossing the Appoquinimink River. After this, the route turns north to remain on Silver Run Road and passes through areas of farms, woods, and wetlands in the Augustine Wildlife Area a short distance to the west of the Delaware River, coming to a bridge over Silver Run. DE 9 turns east onto Bayview Road before turning north onto St. Augustine Road and following the west bank of the Delaware River. The route crosses Augustine Creek and passes through the residential community of Augustine Beach. The road reaches the community of Port Penn, where it is lined with homes. In Port Penn, the route turns west onto Market Street before turning north onto Delaware City Port Penn Road near the Port Penn Interpretive Center.