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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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Clayton County ZIP Codes

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

County State ZIP Code City Area Codes
Clayton County GA 30297 Forest Park 404, 470, 678, 770, 943
Clayton County GA 30298 Forest Park 404
Clayton County GA 30320 Atlanta 404
Clayton County IA 52042 Edgewood 563
Clayton County IA 52043 Elkader 563
Clayton County IA 52044 Elkport 563
Clayton County IA 52047 Farmersburg 563
Clayton County IA 52048 Garber 563
Clayton County IA 52049 Garnavillo 563, 608
Clayton County IA 52052 Guttenberg 563, 608
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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.