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 62444 Mode Shelby County 217, 447
IL 62445 Montrose Cumberland County 217, 447
IL 62446 Mount Erie Wayne County 618
IL 62447 Neoga Cumberland County 217, 447
IL 62448 Newton Jasper County 217, 447, 618
IL 62449 Oblong Crawford County 217, 447, 618
IL 62450 Olney Richland County 618
IL 62451 Palestine Crawford County 618, 812, 930
IL 62452 Parkersburg Richland County 618
IL 62454 Robinson Crawford County 618
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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.