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
All states and U.S. territories
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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 59106 Billings Yellowstone County 406
MT 59107 Billings Yellowstone County 406
MT 59108 Billings Yellowstone County 406
MT 59111 Billings Yellowstone County 406
MT 59112 Billings Yellowstone County 406
MT 59114 Billings Yellowstone County 406
MT 59115 Billings Yellowstone County 406
MT 59116 Billings Yellowstone County 406
MT 59117 Billings Yellowstone County 406
MT 59201 Wolf Point Roosevelt County 406
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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.