New Castle County, DE Zip Codes
28 zip codes across 15 cities in New Castle County, DE
About New Castle County
New Castle County, Delaware (DE) contains 28 unique zip codes spanning 15 cities and communities. Each zip code covers a different area within the county, with varying demographics, income levels, and housing markets.
Browse the complete list below to find detailed population, income, home values, cost of living, and climate data for any zip code in New Castle County.
Cities in New Castle County
Advertisement
All Zip Codes in New Castle County, DE
Advertisement
Explore More
Frequently Asked Questions
How many zip codes are in New Castle County, DE?
New Castle County, DE has 28 zip codes across 15 cities.
What cities are in New Castle County?
Cities in New Castle County include Bear, Claymont, Delaware City, Historic New Castle, Hockessin, Middletown, Montchanin, Newark, Odessa, Port Penn, Rockland, Saint Georges, Wilmington, Zcta 197hh, Zcta 198hh.
What state is New Castle County in?
New Castle County is located in Delaware (DE).
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.