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	59322	Cohagen	Garfield County	`406`
MT	59323	Colstrip	Rosebud County	`406`
MT	59324	Ekalaka	Carter County	`406, 605`
MT	59326	Fallon	Prairie County	`406`
MT	59327	Forsyth	Rosebud County	`406`
MT	59330	Glendive	Dawson County	`406`
MT	59332	Hammond	Carter County	`406`
MT	59333	Hathaway	Rosebud County	`406`
MT	59336	Ismay	Custer County	`406`
MT	59337	Jordan	Garfield 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.