New Castle city, Delaware
Official LSAD Designation: New Castle city • Census GEOID: 1050800
• New Castle County
New Castle city is an incorporated city in New Castle County, Delaware. According to official records from the Census (2025), New Castle city had an estimated population of 5,726 residents. Official Census Bureau geographic records classify this community under LSAD designation New Castle city (GEOID 1050800).
Local Government Administration U.S. Census Bureau GMAF
City Of New Castle
Municipal
Official Title:
City Administrator
Address:
220 DELAWARE ST, NEW CASTLE DE 19720-4816
County Of New Castle
County
Official Title:
Hr Administrator
Address:
87 READS WAY, NEW CASTLE DE 19720-1610
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 5,726 | 2025 |
| Median Household Income | $89,205 | 2020-2024 |
| Median Home Value | $285,100 | 2020-2024 |
| Land Area | 3.48 sq mi | Gazetteer (2026) |
| Civic & Public Services | Hospitals, Libraries, Colleges | CMS / IMLS / IPEDS |
| Schools & Districts | NCES Directory Listings | Provided by k12guides.com |
| Nearby Airports | Landing Facilities | Provided by airport-data.com |
| Climate & Weather | NOAA 30-Year Normals | 1991–2020 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).