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

Logan County ZIP Codes

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

County State ZIP Code City Area Codes
Logan County IL 62518 Chestnut 217, 447
Logan County IL 62519 Cornland 217, 447
Logan County IL 62541 Lake Fork 217, 447
Logan County IL 62543 Latham 217, 447
Logan County IL 62548 Mount Pulaski 217, 447
Logan County IL 62634 Elkhart 217, 447
Logan County IL 62635 Emden 217, 309, 447
Logan County IL 62643 Hartsburg 217, 447
Logan County IL 62656 Lincoln 217, 447
Logan County IL 62666 Middletown 217, 447
Page 3 of 10

Geographic Map of Logan 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.