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	59456	Ledger	Toole County	`406`
MT	59457	Lewistown	Fergus County	`406`
MT	59460	Loma	Chouteau County	`406`
MT	59461	Lothair	Liberty County	`406`
MT	59462	Moccasin	Judith Basin County	`406`
MT	59463	Monarch	Cascade County	`406`
MT	59464	Moore	Fergus County	`406`
MT	59465	Neihart	Cascade County	`406`
MT	59466	Oilmont	Toole County	`406`
MT	59467	Pendroy	Teton 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.