New Castle, Delaware
New Castle is a city in New Castle County, Delaware, with an estimated population of 5,549 in 2023. It sits at 39.6700, -75.5665 in the America/New_York time zone.
| Field | Value |
|---|---|
| Place name | New Castle |
| Type | city |
| State | Delaware (DE) |
| County | New Castle County |
| Population (2023 est.) | 5,549 |
| Land area | 3.48 sq mi (9.01 km²) |
| Coordinates | 39.6700, -75.5665 |
| Time zone | America/New_York |
| ZIP codes | 19720, 19721, 19726 |
ZIP codes and area codes for New Castle
New Castle covers 3 ZIP codes: 19720, 19721, 19726. Browse all ZIP codes in Delaware for the full list.
Where is New Castle?
New Castle is located in Delaware, in New Castle County. The coordinates above can be pasted directly into any map service. The nearest indexed places are listed below, which is a useful check when two states share a place name.
Nearby places
Newport 6 km · DEWilmington 8 km · DEElsmere 8 km · DEPenns Grove 11 km · NJDelaware City 11 km · DEBellefonte 12 km · DESalem 14 km · NJNewark 16 km · DE
Other places in New Castle County
Wilmington 71,675Newark 30,169Middletown 25,022Elsmere 6,157Townsend 2,832Delaware City 1,905Bellefonte 1,233Newport 896Arden 433Odessa 364
Frequently asked questions
What county is New Castle, DE in?
New Castle is in New Castle County, Delaware.
What is the population of New Castle, DE?
The 2023 Census Bureau estimate is 5,549.
What time zone is New Castle in?
New Castle is in the America/New_York time zone.