U.S. postal lookup

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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State directory

Montana ZIP Codes

Complete postal directory, details, and geographic map for the State of Montana.

State ZIP Code City County Area Codes
MT 59871 Sula Ravalli County 208, 406, 986
MT 59872 Superior Mineral County 208, 406, 986
MT 59873 Thompson Falls Sanders County 208, 406, 986
MT 59874 Trout Creek Sanders County 208, 406, 986
MT 59875 Victor Ravalli County 208, 406, 986
MT 59901 Kalispell Flathead County 406
MT 59903 Kalispell Flathead County 406
MT 59904 Kalispell Flathead County 406
MT 59910 Big Arm Lake County 406
MT 59911 Bigfork Flathead County 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.