Flathead County, Montana ZIP codes
17 ZIP codes are in Flathead County, plus 2 that cross in from neighboring counties. It's part of the Kalispell, MT micro area.
- ZIP codes
- 17
- Population in these ZIPs
- 104,257
- Avg. median income
- $73,500population-weighted
- Cities & towns
- 15
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Flathead County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 59901 | Kalispell | 63,161 | $72,523 | $554,300 |
| 59903 PO Box | Kalispell | — | — | — |
| 59904 PO Box | Kalispell | — | — | — |
| 59912 | Columbia Falls | 15,752 | $76,617 | $607,800 |
| 59913 | Coram | 582 | $44,464 | $552,600 |
| 59916 | Essex | 232 | $60,250 | $420,700 |
| 59919 | Hungry Horse | 679 | $53,056 | $339,300 |
| 59920 | Kila | 1,704 | $86,605 | $682,900 |
| 59921 PO Box | Lake Mc Donald | — | — | — |
| 59922 | Lakeside | 2,337 | $87,237 | $846,100 |
| 59925 | Marion | 1,532 | $63,981 | $737,000 |
| 59926 | Martin City | 268 | $70,948 | $501,700 |
| 59927 | Olney | 270 | $58,713 | $549,500 |
| 59928 | Polebridge | 86 | $63,333 | $579,100 |
| 59932 | Somers | 1,850 | $60,152 | $707,600 |
| 59936 | West Glacier | 690 | $85,455 | $816,600 |
| 59937 | Whitefish | 15,114 | $75,428 | $876,600 |
ZIP codes partly in Flathead County
These ZIP codes are mostly in a neighboring county but cover part of Flathead County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 59845 | Hot Springs | Sanders County | 1,223 | $31,970 | $262,900 |
| 59911 | Bigfork | Lake County | 9,493 | $83,019 | $806,200 |
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 and towns in Flathead County
Nearby counties
Frequently asked questions
How many ZIP codes are in Flathead County, Montana?
17 ZIP codes are mainly in Flathead County, and 2 more ZIP codes from neighboring areas reach partly into it.
What cities are in Flathead County?
ZIP codes in Flathead County use the city names Columbia Falls, Coram, Essex, Hungry Horse, Kalispell, Kila, Lake Mc Donald, Lakeside, Marion, Martin City, Olney and Polebridge and others.
What metro area is Flathead County in?
Flathead County is part of the Kalispell, MT micropolitan statistical area.