Helena, MT ZIP Codes
Helena, Montana has 8 ZIP codes: 3 for street addresses (, and ), 3 for PO boxes (, and ) and 2 for single organizations.
Your street decides which one you use.
Which Helena ZIP code is my address in?
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Helena ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
59604, 59620, 59623, 59624, 59625 and 59626 have no area on the Census map. Dashed line: Helena city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
All Helena ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 59601 | street delivery Helena |
| 59602 | street delivery Helena |
| 59604 | PO boxes at the Helena post office Helena |
| 59620 | PO boxes at the Helena post office Helena |
| 59623 | one organization Helena |
| 59624 | PO boxes at the Last Chance post office Last Chance |
| 59625 | one organization Helena |
| 59626 | street delivery Helena |
Why your mail may say Helena when you live outside it
Helena ZIP codes also cover Helena Valley Northeast, Helena Valley West Central and Helena Valley Northwest, so a letter addressed to Helena can go to a home outside the city limits.
A ZIP code does not set your city, school district or tax. Lewis and Clark County property records show which city you are in.
Helena ZIP code questions
What is the main ZIP code for Helena?
59601, the ZIP code of the main Helena post office at 2300 N Harris St.
Which Helena ZIP codes are for PO boxes only?
59604, 59620 and 59624. Mail to them goes to boxes at the post office, not to street addresses.
What county is Helena in?
Lewis and Clark County.
ZIP codes for towns near Helena
More towns near Helena: Idaho Falls, Lewiston, Coeur d'Alene, Post Falls, Pullman, Spokane Valley, Pocatello, Spokane, Boise.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections