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.

42,735 verified records
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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 59727 Divide Silver Bow County 406
MT 59728 Elliston Powell County 406
MT 59729 Ennis Madison County 406
MT 59730 Gallatin Gateway Gallatin County 307, 406
MT 59731 Garrison Powell County 406
MT 59732 Glen Beaverhead County 406
MT 59733 Gold Creek Powell County 406
MT 59735 Harrison Madison County 406
MT 59736 Jackson Beaverhead County 406
MT 59739 Lima Beaverhead County 208, 406, 986
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Geographic Map of Montana

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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.