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 59036 Harlowton Wheatland County 406
MT 59037 Huntley Yellowstone County 406
MT 59038 Hysham Treasure County 406
MT 59039 Ingomar Rosebud County 406
MT 59041 Joliet Carbon County 406
MT 59043 Lame Deer Rosebud County 406
MT 59044 Laurel Yellowstone County 406
MT 59046 Lavina Golden Valley County 406
MT 59047 Livingston Park County 406
MT 59050 Lodge Grass Big Horn County 307, 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.