New Castle County, Delaware ZIP Codes
- ZIP records
29 - Cities represented
16 - Sum of listed ZIP population estimates
573,431
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 19720 | New Castle | 62,392 |
| 2 | 19702 | Newark | 55,683 |
| 3 | 19709 | Middletown | 53,234 |
| 4 | 19711 | Newark | 49,432 |
| 5 | 19701 | Bear | 42,984 |
| 6 | 19805 | Wilmington | 41,402 |
| 7 | 19808 | Wilmington | 39,082 |
| 8 | 19713 | Newark | 30,747 |
| 9 | 19810 | Wilmington | 26,530 |
| 10 | 19802 | Wilmington | 26,051 |
Cities in New Castle County
- Bear
- Claymont
- Delaware City
- Hockessin
- Middletown
- Montchanin
- New Castle
- Newark
- Odessa
- Port Penn
- Rockland
- Saint Georges
- Townsend
- Wilmington
- Winterthur
- Yorklyn
ZIP Directory
- ZIP 19701
- ZIP 19702
- ZIP 19703
- ZIP 19706
- ZIP 19707
- ZIP 19709
- ZIP 19710
- ZIP 19711
- ZIP 19713
- ZIP 19716
- ZIP 19717
- ZIP 19720
- ZIP 19730
- ZIP 19731
- ZIP 19732
- ZIP 19733
- ZIP 19734
- ZIP 19735
- ZIP 19736
- ZIP 19801
- ZIP 19802
- ZIP 19803
- ZIP 19804
- ZIP 19805
- ZIP 19806
- ZIP 19807
- ZIP 19808
- ZIP 19809
- ZIP 19810
Browse all ZIP data for Delaware
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.