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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

ZIP Codes for City of New Castle, DE

New Castle, DE Covers 3 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 19720StandardNew Castle59,250302
ZIP Code 19721UniqueNew Castle0302
ZIP Code 19726UniqueNew Castle0302

Timezone(s):Eastern (GMT -05:00)
Population:5,285 (More Details)
Male Population:2,417
Female Population:2,868
Median Age:44
ZIP Codes:3
Area Codes:1
Total Area:494 square miles (county)
Land Area:426 square miles (county)
Water Area:68 square miles (county)

New Castle, DE Demographic Information *

Total population5,285
Male population2,417
Female population2,868
Median age (years)44.3
White Population3,559
Black Population1,435
Indian Population18
Asian Population61
Hawaiian Population0
Hispanic Population288
Median age (Male)42
Median age (Female)46.2
Total households2,331
Family households (families)1,376
Average household size2.27
Average family size2.94
Total housing units2,497
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 5/1/2022],
  2. Internal Data Creation [Last Updated: 5/1/2022],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],