New Castle County ZIP Codes
Delaware, United States · 52 codes
New Castle County in Delaware has 52 ZIP codes, from 19701 to 19899, serving 52 places.
ZIP codes in New Castle
| ZIP Code | Places |
|---|---|
| 19701 | Bear |
| 19702 | Newark |
| 19703 | Claymont |
| 19706 | Delaware City |
| 19707 | Hockessin |
| 19708 | Kirkwood |
| 19709 | Middletown |
| 19710 | Montchanin |
| 19711 | Newark |
| 19712 | Newark |
| 19713 | Newark |
| 19714 | Newark |
| 19715 | Newark |
| 19716 | Newark |
| 19717 | Newark |
| 19718 | Newark |
| 19720 | New Castle |
| 19721 | New Castle |
| 19725 | Newark |
| 19726 | New Castle |
| 19730 | Odessa |
| 19731 | Port Penn |
| 19732 | Rockland |
| 19733 | Saint Georges |
| 19734 | Townsend |
| 19735 | Winterthur |
| 19736 | Yorklyn |
| 19801 | Wilmington |
| 19802 | Wilmington |
| 19803 | Wilmington |
| 19804 | Wilmington |
| 19805 | Wilmington |
| 19806 | Wilmington |
| 19807 | Wilmington |
| 19808 | Wilmington |
| 19809 | Wilmington |
| 19810 | Wilmington |
| 19850 | Wilmington |
| 19880 | Wilmington |
| 19884 | Wilmington |
| 19885 | Wilmington |
| 19886 | Wilmington |
| 19890 | Wilmington |
| 19891 | Wilmington |
| 19892 | Wilmington |
| 19893 | Wilmington |
| 19894 | Wilmington |
| 19895 | Wilmington |
| 19896 | Wilmington |
| 19897 | Wilmington |
| 19898 | Wilmington |
| 19899 | Wilmington |
Frequently asked questions
What is the ZIP code of New Castle?
New Castle has 52 ZIP codes, from 19701 to 19899. The table lists the places each one serves.
How many places are listed in New Castle County?
52 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.