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	62872	Opdyke	Jefferson County	`618`
IL	62874	Orient	Franklin County	`618`
IL	62875	Patoka	Marion County	`618`
IL	62876	Radom	Washington County	`618`
IL	62877	Richview	Washington County	`618`
IL	62878	Rinard	Wayne County	`618`
IL	62879	Sailor Springs	Clay County	`618`
IL	62880	Saint Peter	Fayette County	`618`
IL	62881	Salem	Marion County	`618`
IL	62882	Sandoval	Marion County	`618`

Page 149 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.