Postal reference / United States
59406Great Falls, Montana
ZIP code 59406 is a United States postal code for Great Falls, Montana. Its county association is Cascade County. The map reference point is at 47.62, -111.2393.
- State / territory
- Montana
- Recorded place name
- Great Falls
- County association
- Cascade
- Estimated coordinate
- 47.62, -111.2393
View on OpenStreetMap - ZIP prefix
- 594 · 64 ZIP codes share it
- Data source
- GeoNames postal reference, snapshot September 26, 2026
GeoNames reference data. County associations may not include every intersecting county, place names are postal names rather than legal boundaries, and coordinates are approximate. This is not address validation.
Need the last four digits?
ZIP+4 depends on the full delivery address. A five-digit code alone cannot determine its extension.
Find ZIP+4Explore Montana
Browse the other 403 ZIP codes recorded for Montana, sorted by code with place and county.
Montana directoryOther ZIP codes in Great Falls, MT
Great Falls has 5 ZIP codes in the reference dataset.
Nearby ZIP code reference points
| ZIP code | Place | State | County association | Miles |
|---|---|---|---|---|
| 59440 | Floweree | MT | Chouteau | 6.1 |
| 59414 | Black Eagle | MT | Cascade | 6.7 |
| 59401 | Great Falls | MT | Cascade | 7.8 |
| 59405 | Great Falls | MT | Cascade | 8.7 |
| 59402 | Malmstrom Afb | MT | Cascade | 8.8 |
| 59403 | Great Falls | MT | Cascade | 8.8 |
| 59404 | Great Falls | MT | Cascade | 9.0 |
| 59472 | Sand Coulee | MT | Cascade | 15.4 |
Straight-line distance between reference points. Nearby points do not prove that ZIP areas touch.
Verify a mailing address
For mailing, confirm the complete street or PO Box address with USPS. A place record does not confirm delivery eligibility or the ZIP+4 extension.
Open USPS address lookup