How to Write a Delaware Address (With Examples)

Address basics  |   |  2 min read

Here is how to write a mailing address in Delaware, with examples from Dover and Wilmington and the most common mistakes to avoid.

The standard format

RECIPIENT NAME STREET NUMBER AND NAME, UNIT CITY, DE ZIP CODE

The state is always written as DE, two capital letters with no periods. USPS prefers the city, state and ZIP on the same final line.

Example: Dover

Anthony Wilson 1702 Walnut Ln Dover, DE 19906

Example with an apartment in Wilmington

Ashley Thompson 7295 Washington Blvd Apt 24 Wilmington, DE 19806

Example with a PO Box

Olivia Brooks PO Box 2249 Dover, DE 19906

PO Boxes often have their own ZIP code, separate from street addresses in the same town. Check the ZIP with the post office that holds the box.

Common mistakes

  • Writing the full state name or an old abbreviation instead of DE.
  • Putting the apartment number on a line below the street address.
  • Using a ZIP code from a neighboring city. One city can have many codes, but each street belongs to a specific one.

Counties and local details

Delaware is divided into 3 counties. The county does not appear in a mailing address, but it matters for sales tax, elections and some shipping rules, so many business systems store it separately.

Create realistic Delaware addresses for testing, with real cities, counties and ZIP codes.

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