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.

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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 59247 Medicine Lake Sheridan County 406
MT 59248 Nashua Valley County 406
MT 59250 Opheim Valley County 306, 406, 474, 639
MT 59252 Outlook Sheridan County 306, 406, 474
MT 59253 Peerless Daniels County 406
MT 59254 Plentywood Sheridan County 406
MT 59255 Poplar Roosevelt County 406
MT 59256 Raymond Sheridan County 406
MT 59257 Redstone Sheridan County 406
MT 59258 Reserve Sheridan 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.