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

Maps and coordinates

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	61544	London Mills	Fulton County	`309`
IL	61545	Lowpoint	Woodford County	`309`
IL	61546	Manito	Mason County	`309`
IL	61547	Mapleton	Peoria County	`309`
IL	61548	Metamora	Woodford County	`309`
IL	61550	Morton	Tazewell County	`309`
IL	61552	Mossville	Peoria County	`309`
IL	61553	Norris	Fulton County	`309`
IL	61554	Pekin	Tazewell County	`309`
IL	61555	Pekin	Tazewell County	`309`

Page 79 of 159

Geographic Map of Illinois

Postal context

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.