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	59026	Edgar	Carbon County	`406`
MT	59027	Emigrant	Park County	`406`
MT	59028	Fishtail	Stillwater County	`406`
MT	59029	Fromberg	Carbon County	`406`
MT	59030	Gardiner	Park County	`307, 406`
MT	59031	Garryowen	Big Horn County	`406`
MT	59032	Grass Range	Fergus County	`406`
MT	59033	Greycliff	Sweet Grass County	`406`
MT	59034	Hardin	Big Horn County	`406`
MT	59035	Fort Smith	Big Horn 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.