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 60953 Milford Iroquois County 219, 765, 779, 815
IL 60954 Momence Kankakee County 219, 779, 815
IL 60955 Onarga Iroquois County 217, 447, 779, 815
IL 60956 Papineau Iroquois County 779, 815
IL 60957 Paxton Ford County 217, 447
IL 60958 Pembroke Township Kankakee County 219, 779, 815
IL 60959 Piper City Ford County 779, 815
IL 60960 Rankin Vermilion County 217, 447, 779, 815
IL 60961 Reddick Kankakee County 779, 815
IL 60962 Roberts Ford County 217, 447, 779, 815
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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.