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.

42,735 verified records
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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 62568 Taylorville Christian County 217, 447
IL 62570 Tovey Christian County 217, 447
IL 62571 Tower Hill Shelby County 217, 447, 618
IL 62572 Waggoner Montgomery County 217, 447
IL 62573 Warrensburg Macon County 217, 447
IL 62601 Alexander Morgan County 217, 447
IL 62610 Alsey Scott County 217, 447
IL 62611 Arenzville Cass County 217, 447
IL 62612 Ashland Cass County 217, 447
IL 62613 Athens Menard County 217, 447
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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.