List of ZIP Codes in New Castle County
The following table lists ZIP Codes associated with New Castle County, Delaware, based on ZIP Code Tabulation Area (ZCTA) data from the U.S. Census Bureau.
| S.N. | Zip Code | Latitude | Longitude | City | Population | Density |
|---|---|---|---|---|---|---|
| 1 | 19701 | 39.58427 | -75.69914 | Bear | 44,801 | 651.0 |
| 2 | 19702 | 39.62199 | -75.72803 | Newark | 56,049 | 770.4 |
| 3 | 19703 | 39.8043 | -75.45794 | Claymont | 15,936 | 1549.6 |
| 4 | 19706 | 39.5715 | -75.5905 | Delaware City | 2,059 | 314.1 |
| 5 | 19707 | 39.78512 | -75.68147 | Hockessin | 17,366 | 508.6 |
| 6 | 19709 | 39.48923 | -75.68314 | Middletown | 50,542 | 251.3 |
| 7 | 19710 | 39.78964 | -75.58458 | Montchanin | 0 | 0.0 |
| 8 | 19711 | 39.71379 | -75.74033 | Newark | 49,113 | 691.9 |
| 9 | 19713 | 39.67097 | -75.70972 | Newark | 30,549 | 907.2 |
| 10 | 19716 | 39.66779 | -75.74595 | Newark | 0 | 0.0 |
| 11 | 19717 | 39.68121 | -75.75343 | Newark | 6,522 | 9758.0 |
| 12 | 19720 | 39.645 | -75.60678 | New Castle | 60,593 | 610.8 |
| 13 | 19730 | 39.45443 | -75.66077 | Odessa | 506 | 289.6 |
| 14 | 19731 | 39.5102 | -75.59616 | Port Penn | 630 | 96.3 |
| 15 | 19732 | 39.80033 | -75.57455 | Rockland | 155 | 34.1 |
| 16 | 19733 | 39.55928 | -75.65143 | Saint Georges | 182 | 639.7 |
| 17 | 19734 | 39.38377 | -75.65026 | Townsend | 14,151 | 68.4 |
| 18 | 19735 | 39.80666 | -75.5973 | Winterthur | 0 | 0.0 |
| 19 | 19736 | 39.78031 | -75.64274 | Yorklyn | 13 | 33.2 |
| 20 | 19801 | 39.72782 | -75.54615 | Wilmington | 16,170 | 1420.0 |
| 21 | 19802 | 39.75715 | -75.52873 | Wilmington | 25,670 | 2844.9 |
| 22 | 19803 | 39.79912 | -75.5422 | Wilmington | 21,971 | 670.1 |
| 23 | 19804 | 39.7166 | -75.62094 | Wilmington | 18,231 | 980.9 |
| 24 | 19805 | 39.74523 | -75.59373 | Wilmington | 40,315 | 2820.9 |
| 25 | 19806 | 39.762 | -75.56336 | Wilmington | 9,934 | 2250.1 |
| 26 | 19807 | 39.79767 | -75.61284 | Wilmington | 7,763 | 165.0 |
| 27 | 19808 | 39.73777 | -75.66596 | Wilmington | 38,334 | 1076.4 |
| 28 | 19809 | 39.75801 | -75.50218 | Wilmington | 15,129 | 864.6 |
| 29 | 19810 | 39.81855 | -75.50628 | Wilmington | 25,859 | 1264.3 |
About New Castle County ZIP Codes
New Castle County in Delaware (DE) is served by approximately 29 ZIP Codes. These codes cover residential neighborhoods, business districts, and rural areas that fall under the county's jurisdiction.
Based on ZIP-level population estimates, the total population covered by these ZIP Codes is around 568,543 people. Population and density values vary from one ZIP Code to another, reflecting the mix of dense urban communities and lower-density suburban or rural zones.
Many of the most significant population centers in New Castle County are located in cities such as Wilmington, Newark, New Castle, Middletown, Bear. These cities and towns help define the economic and demographic character of the county.
Most ZIP Codes in New Castle County, Delaware follow the America/New_York time zone.