Sanborn Iowa ZIP Codes

Sanborn holds a single ZIP code.

Every ZIP code in Sanborn

The complete list of Sanborn, Iowa ZIP codes with the county each falls in.
ZIP code	County
51248	O'Brien 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Sanborn codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Sanborn. 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 Sanborn 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 Sanborn accounts for 5% of it.

Every Iowa ZIP prefix and the region it covers →

Area codes covering Sanborn

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 Sanborn occupies.

712 Area code 712

Sanborn Iowa area codes in full →

Where Sanborn's ZIP codes sit

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

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

Cities near Sanborn

The closest places to Sanborn with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Archer Iowa ZIP codes	6.4 mi	1 ZIP code
Primghar Iowa ZIP codes	6.8 mi	1 ZIP code
Melvin Iowa ZIP codes	7.6 mi	1 ZIP code
Hartley Iowa ZIP codes	9.0 mi	1 ZIP code
Sheldon Iowa ZIP codes	9.5 mi	1 ZIP code
Ashton Iowa ZIP codes	11 mi	1 ZIP code
Paullina Iowa ZIP codes	14 mi	1 ZIP code
Hospers Iowa ZIP codes	15 mi	1 ZIP code

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