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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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Clay County ZIP Codes

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

County State ZIP Code City Area Codes
Clay County IA 51366 Webb 712
Clay County IL 62434 Ingraham 618
Clay County IL 62824 Clay City 618
Clay County IL 62839 Flora 618
Clay County IL 62858 Louisville 217, 447, 618
Clay County IL 62879 Sailor Springs 618
Clay County IL 62899 Xenia 618
Clay County IN 47834 Brazil 765, 812, 930
Clay County IN 47837 Carbon 765, 812, 930
Clay County IN 47840 Centerpoint 765, 812, 930
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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.