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

All states and U.S. territories

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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	61607	Peoria	Peoria County	`309`
IL	61610	Creve Coeur	Tazewell County	`309`
IL	61611	East Peoria	Tazewell County	`309`
IL	61612	Peoria	Peoria County	`309`
IL	61613	Peoria	Peoria County	`309`
IL	61614	Peoria	Peoria County	`309`
IL	61615	Peoria	Peoria County	`309`
IL	61616	Peoria Heights	Peoria County	`309`
IL	61625	Peoria	Peoria County	`309`
IL	61629	Peoria	Peoria County	`309`

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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.