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Directory coverage 42,735 ZIP Code records

Illinois Zip Codes



Illinois Illinois is the 25th most extensive and the 5th most populous of the 50 United States, and is often noted as a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal, timber, and petroleum in the south, Illinois has a broad economic base. Illinois is a major transportation hub. The Port of Chicago connects the state to other global ports from the Great Lakes, via the Saint Lawrence Seaway, to the Atlantic Ocean; as well as the Great Lakes to the Mississippi River, via the Illinois River. For decades, O Hare International Airport has ranked as one of the world s busiest airports. Illinois has long had a reputation as a bellwether both in social and cultural terms and politics.

State Zip Code City County Area Codes
IL 62380 West Point Hancock County 217, 447
IL 62401 Effingham Effingham County 217, 447
IL 62410 Allendale Wabash County 618, 812, 930
IL 62411 Altamont Effingham County 217, 447, 618
IL 62413 Annapolis Crawford County 217, 447, 618
IL 62414 Beecher City Effingham County 217, 447, 618
IL 62417 Bridgeport Lawrence County 618
IL 62418 Brownstown Fayette County 618
IL 62419 Calhoun Richland County 618
IL 62420 Casey Clark County 217, 447, 618
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Map of Illinois

ZIP codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. The term ZIP, an acronym for Zone Improvement Plan, is properly written in capital letters and was chosen to suggest that the mail travels more efficiently, and therefore more quickly, when senders use the code in the postal address. The basic format consists of five decimal numerical digits. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the ZIP code, a hyphen, and four more digits that determine a more precise location than the ZIP code alone. The term ZIP code was originally registered as a servicemark (a type of trademark) by the U.S. Postal Service, but its registration has since expired.

ZIP codes designate only delivery points within the United States and its dependencies, as well as locations of its armed forces. There are no ZIP codes reserved for designating mail bound for foreign destinations (with the exception of U.S. military units stationed outside of the United States), and therefore, international outbound mail should not include a ZIP code in the delivery address. The last line of a foreign address must only show the name of the country of destination.

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