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 62081 Rockbridge Greene County 217, 447, 618
IL 62082 Roodhouse Greene County 217, 447
IL 62083 Rosamond Christian County 217, 447
IL 62084 Roxana Madison County 618
IL 62085 Sawyerville Macoupin County 217, 447
IL 62086 Sorento Bond County 217, 447, 618
IL 62087 South Roxana Madison County 618
IL 62088 Staunton Macoupin County 217, 447, 618
IL 62089 Taylor Springs Montgomery County 217, 447
IL 62090 Venice Madison County 314, 557, 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.