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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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Mchenry County ZIP Codes

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

County State ZIP Code City Area Codes
McHenry County IL 60001 Alden 779, 815
McHenry County IL 60012 Crystal Lake 779, 815
McHenry County IL 60013 Cary 224, 779, 815, 847
McHenry County IL 60014 Crystal Lake 224, 779, 815, 847
McHenry County IL 60021 Fox River Grove 224, 847
McHenry County IL 60033 Harvard 262, 779, 815
McHenry County IL 60034 Hebron 262, 779, 815
Mchenry County IL 60039 Crystal Lake 815
McHenry County IL 60042 Island Lake 224, 779, 815, 847
McHenry County IL 60050 Mchenry 224, 779, 815, 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.