Ashton Iowa ZIP Codes

Ashton holds a single ZIP code.

Every ZIP code in Ashton

The complete list of Ashton, Iowa ZIP codes with the county each falls in.
ZIP code	County
51232	Osceola County

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Ashton codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Ashton. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Ashton ZIP code begins 512. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 20 ZIP codes, so Ashton accounts for 5% of it.

Every Iowa ZIP prefix and the region it covers →

Area codes covering Ashton

ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Ashton occupies.

712 Area code 712

Ashton Iowa area codes in full →

Where Ashton's ZIP codes sit

Each point is one Ashton ZIP code, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Cities near Ashton

The closest places to Ashton with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Sibley Iowa ZIP codes	6.8 mi	1 ZIP code
Matlock Iowa ZIP codes	8.5 mi	1 ZIP code
Melvin Iowa ZIP codes	9.3 mi	1 ZIP code
Sheldon Iowa ZIP codes	9.3 mi	1 ZIP code
Little Rock Iowa ZIP codes	11 mi	1 ZIP code
George Iowa ZIP codes	11 mi	1 ZIP code
Sanborn Iowa ZIP codes	11 mi	1 ZIP code
Boyden Iowa ZIP codes	14 mi	1 ZIP code

Straight-line distance between place reference points, not driving distance.