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 59211 Antelope Sheridan County 406
MT 59212 Bainville Roosevelt County 306, 406, 474, 701
MT 59213 Brockton Roosevelt County 406
MT 59214 Brockway McCone County 406
MT 59215 Circle McCone County 406
MT 59217 Crane Richland County 406
MT 59218 Culbertson Roosevelt County 406
MT 59219 Dagmar Sheridan County 306, 406, 474, 701
MT 59221 Fairview Richland County 306, 406, 474, 701
MT 59222 Flaxville Daniels 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.