ZIP codes in New Castle County
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- 19701 BearNew Castle County
- 19702 BearNew Castle County
- 19703 ClaymontNew Castle County
- 19706 Delaware CityNew Castle County
- 19707 HockessinNew Castle County
- 19709 MiddletownNew Castle County
- 19710 MontchaninNew Castle County
- 19711 NewarkNew Castle County
- 19713 NewarkNew Castle County
- 19716 NewarkNew Castle County
- 19717 NewarkNew Castle County
- 19720 New CastleNew Castle County
- 19730 OdessaNew Castle County
- 19731 Port PennNew Castle County
- 19732 RocklandNew Castle County
- 19733 Saint GeorgesNew Castle County
- 19734 MiddletownNew Castle County
- 19735 ZIP 19735New Castle County
- 19736 HockessinNew Castle County
- 19801 WilmingtonNew Castle County
- 19802 WilmingtonNew Castle County
- 19803 WilmingtonNew Castle County
- 19804 WilmingtonNew Castle County
- 19805 WilmingtonNew Castle County
- 19806 WilmingtonNew Castle County
- 19807 WilmingtonNew Castle County
- 19808 WilmingtonNew Castle County
- 19809 WilmingtonNew Castle County
- 19810 WilmingtonNew Castle County