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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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Stephenson County ZIP Codes

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

County State ZIP Code City Area Codes
Stephenson County IL 61013 Cedarville 779, 815
Stephenson County IL 61018 Dakota 779, 815
Stephenson County IL 61019 Davis 608, 779, 815
Stephenson County IL 61027 Eleroy 779, 815
Stephenson County IL 61032 Freeport 779, 815
Stephenson County IL 61039 German Valley 779, 815
Stephenson County IL 61044 Kent 779, 815
Stephenson County IL 61048 Lena 779, 815
Stephenson County IL 61050 Mc Connell 779, 815
Stephenson County IL 61060 Orangeville 608, 779, 815
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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.