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 60107 Streamwood 224, 331, 630, 847
Cook County IL 60120 Elgin 224, 331, 630, 847
Cook County IL 60130 Forest Park 464, 708
Cook County IL 60131 Franklin Park 224, 331, 464, 630, 708, 773, 847, 872
Cook County IL 60133 Hanover Park 224, 331, 630, 847
Cook County IL 60141 Hines 464, 708
Cook County IL 60153 Maywood 464, 708
Cook County IL 60154 Westchester 331, 464, 630, 708
Cook County IL 60155 Broadview 464, 708
Cook County IL 60159 Schaumburg 224
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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.