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 60623 Chicago Cook County 464, 708, 773, 872
IL 60624 Chicago Cook County 464, 708, 773, 872
IL 60625 Chicago Cook County 773, 872
IL 60626 Chicago Cook County 224, 773, 847, 872
IL 60628 Chicago Cook County 464, 708, 773, 872
IL 60629 Chicago Cook County 464, 708, 773, 872
IL 60630 Chicago Cook County 464, 708, 773, 872
IL 60631 Chicago Cook County 224, 464, 708, 773, 847, 872
IL 60632 Chicago Cook County 464, 708, 773, 872
IL 60633 Chicago Cook County 219, 464, 708, 773, 872
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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.