Wilmington, Delaware ZIP Codes
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This is the complete guide to Wilmington, Delaware ZIP codes — all 25 codes in one place, from 19801 to 19899. If you have been searching for the zip code of Wilmington Delaware USA, the full list below covers every delivery area in the city.
Wilmington lies primarily in New Castle County, Delaware. Because ZIP codes follow mail delivery routes rather than neighborhood lines, different parts of Wilmington use different codes. The list below is sorted numerically, and our free tools can pinpoint the exact ZIP code — including the ZIP+4 add-on — for any Wilmington address.
Complete List of Wilmington ZIP Codes
All 25 wilmington zip codes, sorted from lowest to highest (19801 to 19899):
About Wilmington ZIP Codes
Wilmington is served by 25 ZIP codes (19801–19899). USPS draws ZIP code boundaries around delivery routes, so a code can cover a compact downtown district, a spread-out suburb, or a single high-volume mailer.
Wilmington sits mainly in New Castle County, Delaware. ZIP codes here serve downtown districts, residential neighborhoods, business centers, and surrounding communities that share a Wilmington mailing address.
Mailing to Wilmington? Using the correct ZIP code — and the ZIP+4 add-on where it matters — keeps letters and packages moving without delays or returns. Before you send, you can confirm any Wilmington address with our free Address Verification tool, and find the full 9-digit code with the ZIP+4 Lookup.
How to Find Your Wilmington ZIP Code
Enter a Wilmington street address to get its exact 5-digit ZIP code instantly.
Look up Wilmington, Delaware to see the full list of ZIP codes used across the city.
Explore ZIP codes for every covered city in Delaware on the state page.
Frequently Asked Questions
How many ZIP codes does Wilmington have?
Wilmington has 25 ZIP codes, ranging from 19801 to 19899. The complete list is on this page.
What is the ZIP code of Wilmington, Delaware?
There is no single ZIP code for Wilmington — the city uses 25 ZIP codes (19801 to 19899). Enter your street address in our ZIP Code by Address tool to find your exact one.
What county is Wilmington, Delaware in?
Wilmington is primarily in New Castle County, Delaware.
What is the ZIP code range for Wilmington?
ZIP codes in Wilmington start at 19801 and go up to 19899. Codes are assigned by delivery area, so the lowest codes generally sit closest to the city center and rise as you move outward.
Why does Wilmington have 25 different ZIP codes?
The Postal Service creates a new ZIP code whenever a delivery area grows too large for one code to handle efficiently. A city the size of Wilmington has many delivery routes — neighborhoods, business districts, and high-volume mailers each need their own code so mail can be sorted and delivered accurately.
How do I find my ZIP+4 code in Wilmington?
Use our free ZIP+4 Lookup tool — enter your Wilmington street address to get the full 9-digit code.
Related ZIP Code Tools
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