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
County directory

Coles County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Coles County.

County State ZIP Code City Area Codes
Coles County IL 61912 Ashmore 217, 447
Coles County IL 61920 Charleston 217, 447
Coles County IL 61931 Humboldt 217, 447
Coles County IL 61938 Mattoon 217, 447
Coles County IL 61943 Oakland 217, 447
Coles County IL 62435 Janesville 217, 447
Coles County IL 62440 Lerna 217, 447

Geographic Map of Coles County

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.