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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 60176 Schiller Park 224, 773, 847, 872
Cook County IL 60179 Hoffman Estates 224
Cook County IL 60192 Hoffman Estates 224, 331, 630, 847
Cook County IL 60193 Schaumburg 224, 331, 630, 847
Cook County IL 60194 Schaumburg 224, 331, 630, 847
Cook County IL 60195 Schaumburg 224, 847
Cook County IL 60196 Schaumburg 224
Cook County IL 60201 Evanston 224, 847
Cook County IL 60202 Evanston 224, 773, 847, 872
Cook County IL 60203 Evanston 224, 847
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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.