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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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Franklin County ZIP Codes

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

County State ZIP Code City Area Codes
Franklin County IL 62812 Benton 618
Franklin County IL 62819 Buckner 618
Franklin County IL 62822 Christopher 618
Franklin County IL 62825 Coello 618
Franklin County IL 62836 Ewing 618
Franklin County IL 62840 Frankfort Heights 618
Franklin County IL 62856 Logan 618
Franklin County IL 62860 Macedonia 618
Franklin County IL 62865 Mulkeytown 618
Franklin County IL 62874 Orient 618
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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.