Alton post codes
About Alton
Alton is a place in Sioux County, Iowa (IA), United States. The data lists 1 post codes, led by 51003, in the 5 digits format.
This page contains 1 post code records and 1 distinct post codes. Every post code on this page maps to a single place.
Nearby places include Orange City, Granville, Maurice; the closest is Orange City, about 5 km away. Other places in Sioux County include Boyden, Chatsworth, Granville.
Addresses usually include the place, county, state, post code, and country; the order varies by country, so confirm the local format before mailing.
At a glance
Address example
Postal formats vary by country; these are the address elements.
Other places in Sioux County
All →Shared post codes
Every post code on this page maps to a single place.
Location
FAQ
What post code does Alton use?
51003
Which county is Alton in?
Sioux County
Which state is Alton in?
Iowa (IA)
What is the post code format?
5 digits