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U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

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Flathead County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Flathead County.

County State ZIP Code City Area Codes
Flathead County MT 59922 Lakeside 406
Flathead County MT 59925 Marion 406
Flathead County MT 59926 Martin City 406
Flathead County MT 59927 Olney 406
Flathead County MT 59928 Polebridge 236, 250, 406, 672, 778
Flathead County MT 59932 Somers 406
Flathead County MT 59936 West Glacier 406
Flathead County MT 59937 Whitefish 406
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.