Flathead County, MT ZIP codes
Flathead County ZIP codes by town
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Flathead County ZIP codes
The ZIP codes of Flathead County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Flathead County in numbers
About 110,695 people live in Flathead County, in 44,233 households, the 4th most populous of Montana's 56 counties. The median household income is $73,925 a year, about the same as the Montana median of $72,509 (US: $80,734). The median owner-occupied home is valued at $535,500 (42% above the Montana median), and median gross rent is $1,142 a month. The median age is 42.2; 37.2% of adults 25 and over hold a bachelor's degree or higher (35.2% across Montana); the average commute takes 20 minutes.
| Population | 110,695 |
|---|---|
| Households | 44,233 |
| Median age | 42.2 |
| Median household income | $73,925 |
| Median home value | $535,500 |
| Median gross rent | $1,142 |
| Bachelor's degree or higher | 37.2% |
| Mean commute | 19.6 min |
| Population density | 22 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Flathead County
| Town | ZIP codes | Population |
|---|---|---|
| Kalispell | 3 | 28,504 |
| Whitefish | 1 | 8,749 |
| Columbia Falls | 1 | 5,615 |
| Lakeside | 1 | 2,386 |
| Somers | 1 | 1,280 |
| Marion | 1 | 1,037 |
| Hungry Horse | 1 | 679 |
| Coram | 1 | 452 |
| Kila | 1 | 373 |
| Martin City | 1 | 342 |
| West Glacier | 1 | 263 |
| Olney | 1 | 158 |
| Essex | 1 | 82 |
| Polebridge | 1 | 14 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Flathead County.
Not sure you are in Flathead County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Flathead County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
59901 | Kalispell , MT | Standard | 63,161 | $72,523 | $476,300 |
59903 | Kalispell , MT | No street area | — | — | — |
59904 | Kalispell , MT | No street area | — | — | — |
59912 | Columbia Falls , MT | Standard | 15,752 | $76,617 | $488,800 |
59913 | Coram , MT | Standard | 582 | $44,464 | $560,100 |
59916 | Essex , MT | Standard | 232 | $60,250 | $390,000 |
59919 | Hungry Horse , MT | Standard | 679 | $53,056 | — |
59920 | Kila , MT | Standard | 1,704 | $86,605 | $722,500 |
59921 | Lake Mc Donald , MT | No street area | — | — | — |
59922 | Lakeside , MT | Standard | 2,337 | $87,237 | $657,500 |
59925 | Marion , MT | Standard | 1,532 | $63,981 | $437,800 |
59926 | Martin City , MT | Standard | 268 | $70,948 | $480,000 |
59927 | Olney , MT | Standard | 270 | $58,713 | $445,700 |
59928 | Polebridge , MT | Standard | 86 | $63,333 | $761,900 |
59932 | Somers , MT | Standard | 1,850 | $60,152 | $768,600 |
59936 | West Glacier , MT | Standard | 690 | $85,455 | $532,300 |
59937 | Whitefish , MT | Standard | 15,114 | $75,428 | $698,200 |
Cite this page
zipcodes.pro. “Flathead County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mt/county/flathead
Underlying data is public domain or openly licensed — sources, vintages and licences.