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  2. What is the zip code of Alton, IA, 51003

Alton (IA) Zip Code is 51003 Latest Details Jul, 2025

Updated: 07-07-2025

Alton (IA) zip Code is 51003, Postal Code details. Alton is located in state IA, United States.

Find Zip Code 51003 Details

ZIP code 51003 is located in Alton IA in the United States.

Postal Code United States Zip Code 51003 Latest update Alton, IA
Zip Code / Postal Code 51003

City

Alton

State Code

IA

County

Sioux, United States

Postal Locations

Alton, IA - Zip Code is - 51003

Postal

United States Postal Service USPS Link

Delivery Type

Package Delivery and first class mail.

The zip code 51003 is an essential part of the postal system in Alton, IA. Located in a vibrant part of the city, this zip code covers a variety of neighborhoods, offering residents and businesses a unique blend of suburban comfort and urban convenience. Whether you're looking to send mail, relocate, or simply learn more about the area, Alton has a lot to offer.

FAQ about Zip Code 51003, Alton, (IA)

What is Zip code Alton?

Alton Zip Code: 51003, used by the Alton Post Office and USPS, is a Zone Improvement Plan code that ensures faster, accurate mail delivery in Sioux, IA. Represented by the American Postal Workers Union (APWU), USPS oversees postal operations.

What is Postal code of area Alton?

Alton Postal Code is: 51003

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