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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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Lee County ZIP Codes

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

County State ZIP Code City Area Codes
Lee County IL 61031 Franklin Grove 779, 815
Lee County IL 61042 Harmon 779, 815
Lee County IL 61057 Nachusa 779, 815
Lee County IL 61310 Amboy 779, 815
Lee County IL 61318 Compton 779, 815
Lee County IL 61324 Eldena 779, 815
Lee County IL 61331 Lee Center 779, 815
Lee County IL 61353 Paw Paw 779, 815
Lee County IL 61367 Sublette 779, 815
Lee County IL 61378 West Brooklyn 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.