New Castle County, Delaware
29 ZIP codes · 426.34 sq mi of land · FIPS 10003
| Population | 577,961 |
|---|---|
| State | Delaware |
| FIPS code | 10003 |
| Time zone | Eastern |
| Area code | 302 |
| Land area | 426.34 sq mi |
| Center (lat, long) | 39.5759, -75.6441 |
Cities and towns (largest first)
Wilmington · 71,727Newark · 30,330Middletown · 24,661Bear · 22,370ClaymontDelaware CityHockessinMontchaninNew CastleOdessaPort PennRocklandSaint GeorgesTownsendWinterthurYorklyn
ZIP codes in New Castle County
19701 Bear19702 Newark19703 Claymont19706 Delaware City19707 Hockessin19709 Middletown19710 Montchanin19711 Newark19713 Newark19716 Newark19717 Newark19720 New Castle19730 Odessa19731 Port Penn19732 Rockland19733 Saint Georges19734 Townsend19735 Winterthur19736 Yorklyn19801 Wilmington19802 Wilmington19803 Wilmington19804 Wilmington19805 Wilmington19806 Wilmington19807 Wilmington19808 Wilmington19809 Wilmington19810 Wilmington
Population: U.S. Census Bureau, ACS 5-year estimates, 2024.