Alton, IA ZIP Codes, Coordinates & Counties
Alton, Iowa has 1 ZIP code in Sioux county. The approximate center of Alton is 42.985, -95.987. Alton has about 24,668 known street addresses.
ZIP codes in Alton, IA
| ZIP Code | County | Latitude | Longitude |
|---|---|---|---|
| 51003 | Sioux | 42.985 | -95.987 |
Counties Alton spans
Sioux
Most common streets in Alton
Jefferson, 6th, 3rd, 4th, 7th, Division, 5th, 9th, 11th, 2nd
Frequently asked questions
What ZIP codes are in Alton, IA?
Alton, Iowa has 1 ZIP code, ranging from 51003 to 51003. The full list, with each ZIP's county and coordinates, is in the table on this page.
What county is Alton, IA in?
Alton is in Sioux county.
What are the latitude and longitude of Alton, IA?
The approximate center of Alton, Iowa is latitude 42.985, longitude -95.987. Coordinates for each ZIP code are listed in the table above.
How many ZIP codes does Alton, IA have?
Alton has 1 ZIP code.
How many addresses are in Alton, IA?
Alton, Iowa has about 24,668 known street addresses in the sthan.io US address database.
What are the most common streets in Alton, IA?
Some of the most common street names in Alton are Jefferson, 6th, 3rd, 4th, 7th, Division.
What cities are near Alton, IA?
Cities near Alton include Orange City (5 mi), Granville (7 mi), Hospers (8 mi), Maurice (10 mi), Remsen (13 mi).
Cities near Alton
Orange City, IA (5 mi) Granville, IA (7 mi) Hospers, IA (8 mi) Maurice, IA (10 mi) Remsen, IA (13 mi) Sioux Center, IA (13 mi) Boyden, IA (15 mi) Archer, IA (15 mi)
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View the API →Last updated: June 2026 · Data: sthan.io US address database