City · Delaware · United States

New Castle, DE — ZIP codes

3 ZIP codes · New Castle County

City: New Castle
County: New Castle
State: Delaware
Country: United States
Postal codes: 197201972119726
Single source
Coordinates: 39.5929, -75.6515 View on OpenStreetMap
Area code: 302

ZIP codes (3)

Postal code	Place name	Verification
19720	New Castle	Single source
19721	New Castle	Single source
19726	New Castle	Single source

Sources and verification

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Last generated : 2026-08-21. Report an error.