ZIP Code 51038

51038 is one of Iowa's ZIP codes, delivering to addresses in Merrill, Plymouth County.

City: Merrill
County: Plymouth County
State: Iowa
Prefix: 510xx

Where this code sits

51038 is part of the 510xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Merrill.

Merrill Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51038 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51038

The ZIP codes whose reference points sit closest to 51038.
ZIP code	Distance	Delivers to
ZIP code 51031	7.0 mi	Le Mars, IA
ZIP code 51008	7.4 mi	Brunsville, IA
ZIP code 51024	8.0 mi	Hinton, IA
ZIP code 51045	12 mi	Oyens, IA
ZIP code 51108	13 mi	Sioux City, IA
ZIP code 51062	13 mi	Westfield, IA
ZIP code 51030	14 mi	Lawton, IA
ZIP code 51028	14 mi	Kingsley, IA

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 51038, plotted from its record coordinates.

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

Scope ZIP code 51038. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.