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 62480 Willow Hill Jasper County 618
IL 62481 Yale Jasper County 217, 447, 618
IL 62501 Argenta Macon County 217, 447
IL 62510 Assumption Christian County 217, 447
IL 62512 Beason Logan County 217, 447
IL 62513 Blue Mound Macon County 217, 447
IL 62514 Boody Macon County 217, 447
IL 62515 Buffalo Sangamon County 217, 447
IL 62517 Bulpitt Christian County 217, 447
IL 62518 Chestnut Logan 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.