New Castle County, Delaware

New Castle County is the northernmost and most populous of the three counties of the U.S. state of Delaware. In the census in 2010, the County had 538 479 inhabitants and a population density of 487.8 inhabitants per square kilometer .. The administrative headquarters ( County Seat) is Wilmington.

The Delaware County is part of the metropolitan Philadelphia - Camden - Wilmington ( Delaware Valley metropolitan area also called ), which extends over the four states of Delaware, Maryland, New Jersey and Pennsylvania.


The County is located in Nordoston the Delmarva Peninsula at the mouth of the Delaware River, which forms the north- east and east of the border with New Jersey. Mile Circle, a beaten within a radius of twelve miles around the city of New Castle arc from the Delaware River to Mason - - Dixon - To the north and northwest of the county by the Twelve is line of Pennsylvania separately. To the west the county is bordered by Maryland.

The New Castle County has an area of 1,278 square kilometers, of which 174 square kilometers of water ( 13.62 %) are.

At the New Castle County following county boundaries in Delaware, Pennsylvania, New Jersey and Maryland:


In Wilmington, there is an important seaport. South of Wilmington runs the Chesapeake and Delaware Canal (C & D Canal ), which forms a navigable connection between the Delaware River and the Chesapeake Bay to the west neighboring Maryland.

The Delaware Memorial Bridge is the only road bridge across the Delaware River from Delaware and New Jersey. It leads to Interstate 295 and U.S. Highway 40 jointly by the New Castle County in the Pennsville Township in New Jersey.

In the northern center of New Castle County, 13.9 km south west of Wilmington, is the New Castle Airport.


After the area was mainly inhabited by people of the Lenni Lenape, founded Swedish dealer 1638 with Fort Christina near present-day center of Wilmington the first European settlement on the territory of present-day New Castle County, from where the then colony of New Sweden grew.

In order to prevent further expansion of the Swedish colony, the Dutch built Fort Casimir in 1651, later Nieuw Amstel and present-day New Castle. 1655 conquered the Dutch under Peter Stuyvesant, the Swedish colony.

1664 was the entire territory to England and became part of the colony of New York. In the same year the formation of Countysmit capital New Castle took place. 1680 today Kent County ( Delaware) was cleaved. In 1682, the territory of the colony of New York was ceded to the possessions of William Penn and 1683 connected to Pennsylvania. 1704 got the three lower counties that make up the present-day state of Delaware, its own parliament and its own administration in 1710, whose headquarters was located in the city of New Castle.

Two months after the Declaration of Independence took place with the establishment of the State of Delaware, the complete separation of Pennsylvania. During the Revolutionary War, the capital of Delaware was moved to the south to Dover.

After the Civil War, the county seat of New Castle County was moved to Wilmington.

Demographic data

According to the census in 2010 lived in New Castle County 538 479 people in 198 499 households. The population density was 487.8 inhabitants per square kilometer. In the 198 499 households lived statistically 2.6 persons each.

The racial the population was composed of 65.5 percent white, 23.7 percent African American, 0.3 percent Native American, 4.3 percent Asian and other ethnic groups; 2.5 percent were descended from two or more races. Regardless of ethnicity, 8.7 percent of the population are Hispanic or Latino of any race.

23.2 percent of the population were under 18 years old, 64.5 percent were between 18 and 64 and 12.3 percent were 65 years or older. 51.6 percent of the population was female.

The median income for a household was $ 62,474. The per capita income was $ 31,220. 10.3 percent of the population lived below the poverty line.

Places in New Castle County


  • Delaware City
  • New Castle
  • Newark
  • Wilmington


  • Bellefonte
  • Clayton1
  • Elsmere
  • Middletown


  • Newport
  • Odessa
  • Smyrna1
  • Townsend


  • Arden
  • Arden Croft
  • Ardentown

Census-designated places (CDP )

  • Bear
  • Brookside
  • Claymont
  • Edgemoor
  • Glasgow
  • Greenville
  • Hockessin
  • Northstar
  • Pike Creek
  • Wilmington Manor


  • Collins Park
  • Christiana
  • Holly Oak
  • Marshallton
  • Minquadale
  • Montchanin
  • Ogletown
  • Rockland
  • Saint Georges
  • Stanton
  • Winterthur

1 - partly in Kent County


New Castle County is divided into 11 Census County Divisions (CCD):