New Castle, Delaware

New Castle, Delaware
City
Old New Castle County Courthouse
Flag Seal
Location of New Castle in New Castle County, Delaware (left) and of New Castle County in Delaware (right)
New Castle Location in Delaware Show map of Delaware New Castle New Castle (the United States) Show map of the United States
Coordinates: 39°39′43″N 75°33′59″W / 39.66194°N 75.56639°W / 39.66194; -75.56639
Country	United States
State	Delaware
County	New Castle
Founded	1640
Area [1]
• Total	3.52 sq mi (9.12 km2)
• Land	3.48 sq mi (9.01 km2)
• Water	0.04 sq mi (0.11 km2)
Elevation	10 ft (3 m)
Population  (2020)
• Total	5,551
• Density	1,596.03/sq mi (616.23/km2)
Time zone	UTC−5 (Eastern (EST))
• Summer (DST)	UTC−4 (EDT)
ZIP codes	19720-19721, 19726
Area code	302
FIPS code	10-50800
GNIS feature ID	214379[2]
Website	newcastlecity.delaware.gov

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.^[3] New Castle constitutes part of the Delaware Valley or Philadelphia metropolitan area.