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 60457 Hickory Hills Cook County 464, 708
IL 60458 Justice Cook County 464, 708
IL 60459 Burbank Cook County 464, 708, 773, 872
IL 60460 Odell Livingston County 779, 815
IL 60461 Olympia Fields Cook County 464, 708
IL 60462 Orland Park Cook County 464, 708
IL 60463 Palos Heights Cook County 464, 708
IL 60464 Palos Park Cook County 331, 464, 630, 708
IL 60465 Palos Hills Cook County 464, 708
IL 60466 Park Forest Cook County 464, 708
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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.