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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State directory

Illinois ZIP Codes

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

State ZIP Code City County Area Codes
IL 62458 Saint Elmo Fayette County 217, 447, 618
IL 62459 Sainte Marie Jasper County 618
IL 62460 Saint Francisville Lawrence County 618, 812, 930
IL 62461 Shumway Effingham County 217, 447, 618
IL 62462 Sigel Shelby County 217, 447
IL 62463 Stewardson Shelby County 217, 447
IL 62464 Stoy Crawford County 618
IL 62465 Strasburg Shelby County 217, 447
IL 62466 Sumner Lawrence County 618
IL 62467 Teutopolis Effingham 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.