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
All states and U.S. territories
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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 60696 Chicago Cook County 312
IL 60697 Chicago Cook County 312
IL 60699 Chicago Cook County 708, 773, 312, 872
IL 60701 Chicago Cook County 312, 224
IL 60706 Harwood Heights Cook County 464, 708, 773, 872
IL 60707 Elmwood Park Cook County 464, 708, 773, 872
IL 60712 Lincolnwood Cook County 224, 773, 847, 872
IL 60714 Niles Cook County 224, 773, 847, 872
IL 60803 Alsip Cook County 464, 708, 773, 872
IL 60804 Cicero Cook County 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.