How to Write a Idaho Address (With Examples)

Address basics  |   |  2 min read

Writing a Idaho address correctly comes down to three things: the right street format, the two-letter code ID and a ZIP code that matches the city.

The standard format

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

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

Example: Boise

Liam Moore 766 Sunset Ln Boise, ID 83703

Example with an apartment in Boise

Olivia Rodriguez 1612 Washington Ct Apt 27B Boise, ID 83702

Example with a PO Box

David Rivera PO Box 843 Boise, ID 83702

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

  • Mixing up ID with IA (Iowa) and IN (Indiana). These codes look similar and cause misrouted mail.
  • Writing the full state name or an old abbreviation instead of ID.
  • 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

Idaho is divided into 44 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 Idaho addresses for testing, with real cities, counties and ZIP codes.

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