How do I find a ZIP code by city or state?

You can find ZIP codes by city or state using our search tool. Just enter the city or state name, and you'll see all related ZIP codes instantly.

What is a ZIP+4 code?

A ZIP+4 code adds four digits to the basic five-digit ZIP code. It helps the USPS deliver mail more precisely to specific addresses or buildings.

Are ZIP codes the same as postal codes?

ZIP codes are the U.S. version of postal codes, used by the USPS to identify delivery areas. Other countries use postal codes with different formats.

Complete ZIP Codes For New Castle, Delaware

Browse New Castle ZIP Codes

ZIP Codes in New Castle County help organize mail delivery and define local service areas. Each ZIP Code corresponds to a specific community or post office, ensuring residents, businesses, and visitors can find accurate address information quickly. By browsing the complete list of New Castle ZIP Codes, you can easily identify the correct code for mailing, business, or geographic purposes.

New Castle

Post Office	New Castle
Division	New Castle
Pincode	19720

Newark

Post Office	Newark
Division	New Castle
Pincode	19702

Newark

Post Office	Newark
Division	New Castle
Pincode	19711

Middletown

Post Office	Middletown
Division	New Castle
Pincode	19709

Bear

Post Office	Bear
Division	New Castle
Pincode	19701

Wilmington

Post Office	Wilmington
Division	New Castle
Pincode	19808

Total Post Offices (52) Page 1 of 9
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Cities in New Castle

17 cities in New Castle County | List of ZIP Codes in Delaware

ZIP codes in New Castle County, Delaware not only facilitate mail delivery but also provide important demographic and geographic insights. Each ZIP code corresponds to specific areas within the county, helping businesses, residents, and researchers understand population distribution, city locations, and service coverage across New Castle County.

Businesses and service providers rely on accurate ZIP code information in New Castle County to plan deliveries, target customers, and ensure timely services. By referencing the full list of ZIP codes, companies can optimize logistics and outreach, while residents can easily identify the correct postal codes for their addresses within Delaware.

Knowing the correct ZIP codes in New Castle County ensures fast and accurate mail delivery from the United States Postal Service (USPS). It also helps travelers, online shoppers, and local residents navigate efficiently across towns and communities in New Castle County, making ZIP codes an essential part of daily life and business operations.