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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County directory

Butte County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Butte County.

County State ZIP Code City Area Codes
Butte County SD 57760 Newell 605
Butte County SD 57762 Nisland 605
Butte County SD 57788 Vale 605
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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.