Alton Zip Codes - Sioux County IA

Alton, IA Zip Code Map

Alton, IA is a city located in Sioux County, Iowa and has a land area of 54.36 square miles (140.79 km2). The water area for the city is 0.03 square miles or 0.08 km2. There is one unique zip code in Alton, Iowa and it is 51003. The area code(s) for Alton is 712.

Zip Codes for Alton, IA (1)
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51003 Alton Sioux

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