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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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Pennington County ZIP Codes

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

County State ZIP Code City Area Codes
Pennington County MN 56701 Thief River Falls 218
Pennington County MN 56725 Goodridge 218
Pennington County MN 56754 Saint Hilaire 218
Pennington County SD 57701 Rapid City 605
Pennington County SD 57702 Rapid City 605
Pennington County SD 57703 Rapid City 605
Pennington County SD 57709 Rapid City 605
Pennington County SD 57719 Box Elder 605
Pennington County SD 57725 Caputa 605
Pennington County SD 57745 Hill City 307, 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.