U.S. postal lookup

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.

42,735 verified records
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State directory

Illinois ZIP Codes

Complete postal directory, details, and geographic map for the State of Illinois.

State ZIP Code City County Area Codes
IL 62862 Mill Shoals White County 618
IL 62863 Mount Carmel Wabash County 618, 812, 930
IL 62864 Mount Vernon Jefferson County 618
IL 62865 Mulkeytown Franklin County 618
IL 62866 Nason Jefferson County 618
IL 62867 New Haven Gallatin County 618, 812, 930
IL 62868 Noble Richland County 618
IL 62869 Norris City White County 618
IL 62870 Odin Marion County 618
IL 62871 Omaha Gallatin County 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.