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 62554 Oreana Macon County 217, 447
IL 62555 Owaneco Christian County 217, 447
IL 62556 Palmer Christian County 217, 447
IL 62557 Pana Christian County 217, 447
IL 62558 Pawnee Sangamon County 217, 447
IL 62560 Raymond Montgomery County 217, 447
IL 62561 Riverton Sangamon County 217, 447
IL 62563 Rochester Sangamon County 217, 447
IL 62565 Shelbyville Shelby County 217, 447
IL 62567 Stonington Christian 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.