Great Falls, MT ZIP codes
Great Falls, Montana has 5 ZIP codes, including 2 PO Box ZIPs. They are in Cascade County.
- Population in these ZIPs
- 75,427
- Avg. median income
- $68,100population-weighted
- Typical home value
- $344,200population-weighted
- Metro area
- Great Falls, MT
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Great Falls, MT ZIP codes list
| ZIP code | County | Population | Median income | Typical home value |
|---|---|---|---|---|
| 59401 | Cascade County | 13,255 | $55,299 | $287,600 |
| 59403 PO Box | Cascade County | — | — | — |
| 59404 | Cascade County | 28,822 | $83,867 | $389,700 |
| 59405 | Cascade County | 33,350 | $59,449 | $327,400 |
| 59406 PO Box | Cascade County | — | — | — |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Great Falls
Frequently asked questions
What is the ZIP code for Great Falls, MT?
Great Falls, MT has 5 ZIP codes: 59401, 59403, 59404, 59405 and 59406.
What county is Great Falls, Montana in?
Great Falls ZIP codes are in Cascade County.
Which Great Falls ZIP codes are PO Boxes?
59403 and 59406 are PO Box or single-organization ZIP codes; they have no residential delivery area.