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.

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Cook County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Cook County.

County State ZIP Code City Area Codes
Cook County IL 60455 Bridgeview 464, 708
Cook County IL 60456 Hometown 464, 708, 773, 872
Cook County IL 60457 Hickory Hills 464, 708
Cook County IL 60458 Justice 464, 708
Cook County IL 60459 Burbank 464, 708, 773, 872
Cook County IL 60461 Olympia Fields 464, 708
Cook County IL 60462 Orland Park 464, 708
Cook County IL 60463 Palos Heights 464, 708
Cook County IL 60464 Palos Park 331, 464, 630, 708
Cook County IL 60465 Palos Hills 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.