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	59443	Fort Shaw	Cascade County	`406`
MT	59444	Galata	Liberty County	`406`
MT	59446	Geraldine	Chouteau County	`406`
MT	59447	Geyser	Judith Basin County	`406`
MT	59448	Heart Butte	Pondera County	`406`
MT	59450	Highwood	Chouteau County	`406`
MT	59451	Hilger	Fergus County	`406`
MT	59452	Hobson	Judith Basin County	`406`
MT	59453	Judith Gap	Wheatland County	`406`
MT	59454	Kevin	Toole 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.