New Castle, Delaware — street map as of June 2025. Main streets and districts of New Castle, DE.

New Castle, Delaware is the county seat of New Castle County. New Castle was originally settled by the Dutch in 1651 and called Fort Casimir. In 1680 it was renamed New Castle by the English. Today New Castle is home to 6 thousand residents. This interactive map shows the detailed scheme of New Castle streets, including landmarks and public infrastructure. To zoom in or out the map use the buttons shown. Move the center of this map by dragging it. You can also check out the satellite map, Google map, population, things to do, open street map and street view of New Castle.