51003 postal code
United StatesUpdated 2026-11-09Alton, IowaSioux5 digits
Postal code details
1 placeCode
51003
Place
Alton
Region
Iowa
County
Sioux
Coordinates
42.9782, -96.0173
Accuracy
4 / 6
Country
United States
Location
OpenStreetMap ↗
42.9782, -96.0173© OpenStreetMap
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Places under this code
1| Place | Region | County | Coordinates |
|---|---|---|---|
| Alton | Iowa | Sioux | 42.9782, -96.0173 |
FAQ
Which city is 51003 in?
Alton, Iowa, United States.
What are the coordinates of 51003?
42.9782, -96.0173
Is 51003 used in other countries?
Yes, 5 other countries.
Updated 2026-11-09. Attribution in Data & license.