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 60930 Danforth Iroquois County 779, 815
IL 60931 Donovan Iroquois County 219, 779, 815
IL 60932 East Lynn Vermilion County 217, 447
IL 60933 Elliott Ford County 217, 447
IL 60934 Emington Livingston County 779, 815
IL 60935 Essex Kankakee County 779, 815
IL 60936 Gibson City Ford County 217, 309, 447
IL 60938 Gilman Iroquois County 779, 815
IL 60939 Goodwine Iroquois County 779, 815
IL 60940 Grant Park Kankakee County 219, 464, 708, 779, 815
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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.