Cities and Towns in New Castle County, Delaware
Founded in 1664, New Castle County is one of 3 counties in the state of Delaware. Historically, New Castle County was formed from formally New Amstel. The city of Wilmington is the county seat. With FIPS code of 3, New Castle County has a population of 571,708 and area of 494 square miles (1,279 km²).
List of all cities in New Castle County, DE alphabetically
| City/Town | Postal Code | Area Code |
| Arden, DE | 19810 | 302 |
| Astrazeneca, DE | 19897 | 302 |
| Avon Products Inc, DE | 19712 | 302 |
| Bank of America, DE | 19884 | 302 |
| 19886 | 302 | |
| 19891 | 302 | |
| Bear, DE | 19701 | 302 |
| Bellefonte, DE | 19809 | 302 |
| Blackbird, DE | 19734 | 302 |
| Chase Manhattan Bank N A, DE | 19893 | 302 |
| Christiana, DE | 19702 | 302 |
| Christiana Medical Center, DE | 19718 | 302 |
| Citibank, DE | 19721 | 302 |
| 19892 | 302 | |
| Claymont, DE | 19703 | 302 |
| Delaware City, DE | 19706 | 302 |
| Delmarva Power, DE | 19895 | 302 |
| Dupont Co Inc, DE | 19898 | 302 |
| Edgemoor, DE | 19802 | 302 |
| 19809 | 302 | |
| 19810 | 302 | |
| Elsmere, DE | 19805 | 302 |
| Greenville, DE | 19807 | 302 |
| 19884 | 302 | |
| Hercules Incorporated, DE | 19894 | 302 |
| Hockessin, DE | 19707 | 302 |
| Kirkwood, DE | 19708 | 302 |
| Manor, DE | 19720 | 302 |
| Marshallton, DE | 19808 | 302 |
| Middletown, DE | 19709 | 302 |
| Minquadale, DE | 19720 | 302 |
| Montchanin, DE | 19710 | 302 |
| New Castle, DE | 19720 | 302 |
| 19721 | 302 | |
| Newark, DE | 19702 | 302 |
| 19711 | 302 | |
| 19712 | 302 | |
| 19713 | 302 | |
| 19714 | 302 | |
| 19715 | 302 | |
| 19716 | 302 | |
| 19717 | 302 | |
| 19718 | 302 | |
| 19725 | 302 | |
| 19726 | 302 | |
| Newport, DE | 19804 | 302 |
| Odessa, DE | 19730 | 302 |
| Port Penn, DE | 19731 | 302 |
| Rockland, DE | 19732 | 302 |
| Saint Georges, DE | 19733 | 302 |
| Shared Firm Zip, DE | 19725 | 302 |
| 19726 | 302 | |
| 19885 | 302 | |
| 19886 | 302 | |
| Stanton, DE | 19804 | 302 |
| Talleyville, DE | 19803 | 302 |
| Talleyville Postal Store, DE | 19803 | 302 |
| Townsend, DE | 19734 | 302 |
| Verizon, DE | 19896 | 302 |
| Wilmington, DE | 19801 | 302 |
| 19802 | 302 | |
| 19803 | 302 | |
| 19804 | 302 | |
| 19805 | 302 | |
| 19806 | 302 | |
| 19807 | 302 | |
| 19808 | 302 | |
| 19809 | 302 | |
| 19810 | 302 | |
| 19850 | 302 | |
| 19880 | 302 | |
| 19884 | 302 | |
| 19885 | 302 | |
| 19886 | 302 | |
| 19890 | 302 | |
| 19891 | 302 | |
| 19892 | 302 | |
| 19893 | 302 | |
| 19894 | 302 | |
| 19895 | 302 | |
| 19896 | 302 | |
| 19897 | 302 | |
| 19898 | 302 | |
| 19899 | 302 | |
| Wilmington Trust, DE | 19890 | 302 |
| Winterthur, DE | 19735 | 302 |
| Yorklyn, DE | 19736 | 302 |
Map of Cities in New Castle County, DE
