US States Zip Directory 2026

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Currently We have more than 42735 Records of US States Zip Codes from all over the United States!

Iowa Zip Codes



Iowa Iowa is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New France. After the Louisiana Purchase, settlers laid the foundation for an agriculture-based economy in the heart of the Corn Belt. Iowa is often known as the "Food Capital of the World".

In the latter half of the 20th century, Iowa s agricultural economy transitioned to a diversified economy of advanced manufacturing, processing, financial services, biotechnology, and green energy production. Iowa is the 26th most extensive and the 30th most populous of the 50 United States. Its capital and largest city is Des Moines. Iowa has been listed as one of the safest states to live in.

State Zip Code City County Area Codes
IA 50548 Humboldt Humboldt County 515
IA 50551 Jolley Calhoun County 712
IA 50552 Knierim Calhoun County 515, 712
IA 50554 Laurens Pocahontas County 712
IA 50556 Ledyard Kossuth County 515
IA 50557 Lehigh Webster County 515
IA 50558 Livermore Humboldt County 515
IA 50559 Lone Rock Kossuth County 515
IA 50560 Lu Verne Kossuth County 515
IA 50561 Lytton Sac County 712
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Map of Iowa


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.