Alton, Iowa ZIP Code - United States

The location Alton, IA has been assigned with the 51003 as the only ZIP Code. Check the map below to see the aproximate zone for this Postal Code. To zoom the map, click the "load map" button.

	City Name	ZIP Code	ZIP Type	Estimated Population
Alton, IA	PRIMARY	51003	STANDARD	1.440

Postal Zone of Alton, IA - USA

Alton, Iowa ZIP Code - United States — ZIP Code Tabulation Areas (ZCTAs) for Alton, IA ZIP Code. A ZCTA is a generalized area representation of the american ZIP Code service area.

Alton, IA belongs to which county?

Alton, IA belongs to Sioux county. Check the list of Sioux county ZIP Code.

ZIP Code Iowa

Check the list of Iowa ZIP Code.

ZIP Code United States

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Status Definitions

PRIMARY: means an the primary city name. Official city name, although the city name might also have another acceptable name.
ACCEPTABLE: means an adequate city name. City names that are abbreviated will frequently be listed as unacceptable because abbreviations are not an acceptable city name format.
IMPROPER/NOT ACCEPTABLE: Means an inadequate city name has been entered or received based on information entered.
UNIQUE: Assigned to a company, government agency, or entity with sufficient mail volume, based on average daily volume of letter size mail received, availability of ZIP Code numbers in the postal area, and the US mail service cost-benefit analysis.