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 59052 Mc Leod Sweet Grass County 406
MT 59053 Martinsdale Meagher County 406
MT 59054 Melstone Musselshell County 406
MT 59055 Melville Sweet Grass County 406
MT 59057 Molt Yellowstone County 406
MT 59058 Mosby Garfield County 406
MT 59059 Musselshell Musselshell County 406
MT 59061 Nye Stillwater County 406
MT 59062 Otter Powder River County 307, 406
MT 59063 Park City Stillwater 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.