ZIP Codes in are essential for accurate and timely mail delivery. Managed by the United States Postal Service (USPS), these postal codes help identify specific regions, cities, and post offices. Typically, the first digit represents a broad region, the next two indicate a smaller geographic area, and the final two digits identify specific delivery zones or post offices within .
| Post Office | New Castle |
| Division | New Castle |
| Pincode | 19720 |
| Post Office | Newark |
| Division | New Castle |
| Pincode | 19702 |
| Post Office | Newark |
| Division | New Castle |
| Pincode | 19711 |
| Post Office | Middletown |
| Division | New Castle |
| Pincode | 19709 |
| Post Office | Bear |
| Division | New Castle |
| Pincode | 19701 |
| Post Office | Dover |
| Division | Kent |
| Pincode | 19901 |
"Explore Delaware ZIP Codes: A Guide to the Postal Codes of the Delaware State"