Merrill Iowa ZIP Codes

Merrill holds a single ZIP code.

Every ZIP code in Merrill

The complete list of Merrill, Iowa ZIP codes with the county each falls in.
ZIP code	County
51038	Plymouth 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Merrill codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Merrill. 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 Merrill ZIP code begins 510. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 55 ZIP codes, so Merrill accounts for 2% of it.

Every Iowa ZIP prefix and the region it covers →

Area codes covering Merrill

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 Merrill occupies.

712 Area code 712

Merrill Iowa area codes in full →

Where Merrill's ZIP codes sit

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

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

Cities near Merrill

The closest places to Merrill with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Le Mars Iowa ZIP codes	5.8 mi	1 ZIP code
Brunsville Iowa ZIP codes	6.3 mi	1 ZIP code
Hinton Iowa ZIP codes	7.1 mi	1 ZIP code
Oyens Iowa ZIP codes	12 mi	1 ZIP code
Remsen Iowa ZIP codes	16 mi	1 ZIP code
Sioux City Iowa ZIP codes	17 mi	9 ZIP codes
Akron Iowa ZIP codes	17 mi	1 ZIP code
Kingsley Iowa ZIP codes	17 mi	1 ZIP code

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