New Castle is a city in New Castle County, Delaware, United States. The city is located six miles (10 km) south of Wilmington and is situated on the Delaware River. As of 2020, the city's population was 5,551. New Castle constitutes part of the Delaware Valley or Philadelphia metropolitan area.
Mid-Atlantic
New Castle
New Castle County, DE
Population
5,523
Walk Score
64 · Somewhat Walkable
Median rent
$1,525
Median home value
$240,800
Founded
1651
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On the National Register
Historic districts
- New Castle Historic District · listed 1967
- New Castle Historic District · listed 1984
Notable landmarks
- Air Service, Inc. Hangar at Bellanca Airfield · listed 2005
- Amstel House · listed 1977
- George Read II House
- George Read II House
- Glebe House · listed 1973
- Grantham-Edwards-McComb House · listed 2016
- Hermitage, The · listed 1973
- Lesley-Travers Mansion · listed 1973
- New Castle County Court House · listed 1972
- New Castle Ice Piers · listed 1982
- Parker's Dairy Palace · listed 2019
- Penn Farm of the Trustees of the New Castle Common · listed 1997
- Stonum · listed 1973
- Swanwyck · listed 1977
- Tat-Tat
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