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 62893 Walnut Hill Marion County 618
IL 62894 Waltonville Jefferson County 618
IL 62895 Wayne City Wayne County 618
IL 62896 West Frankfort Franklin County 618
IL 62897 Whittington Franklin County 618
IL 62898 Woodlawn Jefferson County 618
IL 62899 Xenia Clay County 618
IL 62901 Carbondale Jackson County 618
IL 62902 Carbondale Jackson County 618
IL 62903 Carbondale Jackson 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.