Find the last 4 digits (ZIP+4) for an address in 19721

ZIP 19721, New Castle, DE is filled in. Just type the street address.

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ZIP Code 19721 – New Castle, DE

New Castle, Delaware · New Castle County · Eastern time

ZIP code19721
CityNew Castle
StateDelaware
CountyNew Castle County
Area code302
PopulationNot published (no Census ZIP area)
Time zoneEastern · local time
ZIP typePO box or unique ZIP (no Census area)
Center (lat, long)39.5645, -75.5970

Map

Nearby ZIP codes

19712 Newark · 0 mi19714 Newark · 0 mi19715 Newark · 0 mi19718 Newark · 0 mi19725 Newark · 0 mi19850 Wilmington · 0 mi19880 Wilmington · 0 mi19890 Wilmington · 0 mi

About ZIP 19721

ZIP code 19721 is assigned to New Castle, Delaware. It lies in New Castle County. It is a PO-box-only or single-address ZIP, so the Census Bureau does not publish an area for it; the location shown is approximate. The closest neighboring ZIP is 19712 (Newark), about 0 miles away.

Every address in 19721 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources