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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Illinois ZIP Codes

Complete postal directory, details, and geographic map for the State of Illinois.

State ZIP Code City County Area Codes
IL 60941 Herscher Kankakee County 779, 815
IL 60942 Hoopeston Vermilion County 217, 447, 765, 779, 815
IL 60944 Hopkins Park Kankakee County 815
IL 60945 Iroquois Iroquois County 779, 815
IL 60946 Kempton Ford County 779, 815
IL 60948 Loda Iroquois County 217, 447, 779, 815
IL 60949 Ludlow Champaign County 217, 447
IL 60950 Manteno Kankakee County 464, 708, 779, 815
IL 60951 Martinton Iroquois County 779, 815
IL 60952 Melvin Ford County 217, 447, 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.