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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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Polk County ZIP Codes

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

County State ZIP Code City Area Codes
Polk County OR 97347 Grand Ronde 503, 971
Polk County OR 97351 Independence 458, 503, 541, 971
Polk County OR 97361 Monmouth 458, 503, 541, 971
Polk County OR 97371 Rickreall 503, 971
Polk County TN 37307 Benton 423
Polk County TN 37316 Conasauga 423
Polk County TN 37317 Copperhill 423, 706, 762, 828
Polk County TN 37325 Delano 423
Polk County TN 37326 Ducktown 423
Polk County TN 37333 Farner 423, 828
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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.