New Castle is a city located in New Castle County, Delaware. It's situated on the Delaware River, just six miles south of Wilmington. As of 2020, the city's population was around 5,551 and is part of the Delaware Valley or Philadelphia metropolitan area.

New Castle offers a charming historic district with plenty of things to see and do, including Battery Park, the New Castle Court House, the Dutch House Museum and Gardens, the Amstel House Museum and Gardens, and the New Castle Visitor Center at The Arsenal.