Delaware State Route 9A is a short north-south highway near Wilmington, in New Castle County. SE St Rt 9A passes through the following town in New Castle County. Wilmington DE St Rt 9A is not multu-plexed in New Castle County. DE St Rt 9A intersects the following highways in New Castle County. Delaware State Route 9, near Wilmington. Interstate 495, near Wilmington. U.S. Rt. 13, near Wilmington. Delaware State Route 9, near Wilmington.
