How to Write a Montana Address (With Examples)

Address basics  |   |  2 min read

Here is how to write a mailing address in Montana, with examples from Helena and Missoula and the most common mistakes to avoid.

The standard format

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

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

Example: Helena

Wei Martinez 8097 Hill St Helena, MT 59602

Example with an apartment in Missoula

John Nguyen 1270 Oak Blvd Apt 15B Missoula, MT 59802

Example with a PO Box

Priya Hernandez PO Box 771 Helena, MT 59626

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 MT with MO (Missouri). These codes look similar and cause misrouted mail.
  • Writing the full state name or an old abbreviation instead of MT.
  • 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

Montana is divided into 56 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 Montana addresses for testing, with real cities, counties and ZIP codes.

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