Coulter Iowa ZIP Codes

Coulter holds a single ZIP code.

Every ZIP code in Coulter

The complete list of Coulter, Iowa ZIP codes with the county each falls in.
ZIP code	County
50431	Franklin 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Coulter codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Coulter. 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 Coulter ZIP code begins 504. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 57 ZIP codes, so Coulter accounts for 2% of it.

Every Iowa ZIP prefix and the region it covers →

Area codes covering Coulter

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 Coulter occupies.

641 Area code 641

Coulter Iowa area codes in full →

Where Coulter's ZIP codes sit

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

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

Cities near Coulter

The closest places to Coulter with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Latimer Iowa ZIP codes	2.1 mi	1 ZIP code
Alexander Iowa ZIP codes	7.4 mi	1 ZIP code
Hampton Iowa ZIP codes	8.4 mi	1 ZIP code
Dows Iowa ZIP codes	8.5 mi	1 ZIP code
Rowan Iowa ZIP codes	9.2 mi	1 ZIP code
Popejoy Iowa ZIP codes	10 mi	1 ZIP code
Galt Iowa ZIP codes	12 mi	1 ZIP code
Geneva Iowa ZIP codes	13 mi	1 ZIP code

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