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 59537 Loring Phillips County 306, 406, 474
MT 59538 Malta Phillips County 406
MT 59540 Rudyard Hill County 406
MT 59542 Turner Blaine County 306, 406, 474
MT 59544 Whitewater Phillips County 306, 406, 474, 639
MT 59545 Whitlash Liberty County 368, 403, 406, 587, 825
MT 59546 Zortman Phillips County 406
MT 59547 Zurich Blaine County 406
MT 59601 Helena Lewis and Clark County 406
MT 59602 Helena Lewis and Clark 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.