Hartley Iowa ZIP Codes

Hartley holds a single ZIP code.

Every ZIP code in Hartley

The complete list of Hartley, Iowa ZIP codes with the county each falls in.
ZIP code	County
51346	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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Hartley codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Hartley. 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 Hartley ZIP code begins 513. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 23 ZIP codes, so Hartley accounts for 4% of it.

Every Iowa ZIP prefix and the region it covers →

Area codes covering Hartley

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 Hartley occupies.

712 Area code 712

Hartley Iowa area codes in full →

Where Hartley's ZIP codes sit

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

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

Cities near Hartley

The closest places to Hartley with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Everly Iowa ZIP codes	8.1 mi	1 ZIP code
Sanborn Iowa ZIP codes	9.0 mi	1 ZIP code
Primghar Iowa ZIP codes	9.7 mi	1 ZIP code
Melvin Iowa ZIP codes	10 mi	1 ZIP code
Royal Iowa ZIP codes	13 mi	1 ZIP code
Archer Iowa ZIP codes	14 mi	1 ZIP code
Sutherland Iowa ZIP codes	14 mi	1 ZIP code
Spencer Iowa ZIP codes	17 mi	1 ZIP code

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