ZIP Code 51031

51031 is one of Iowa's ZIP codes, delivering to addresses in Le Mars, Plymouth County.

City: Le Mars
County: Plymouth County
State: Iowa
Prefix: 510xx

Where this code sits

51031 is part of the 510xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Le Mars.

Le Mars Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51031 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51031

The ZIP codes whose reference points sit closest to 51031.
ZIP code	Distance	Delivers to
ZIP code 51008	4.8 mi	Brunsville, IA
ZIP code 51045	6.0 mi	Oyens, IA
ZIP code 51038	7.0 mi	Merrill, IA
ZIP code 51050	11 mi	Remsen, IA
ZIP code 51036	12 mi	Maurice, IA
ZIP code 51027	14 mi	Ireton, IA
ZIP code 51003	15 mi	Alton, IA
ZIP code 51024	15 mi	Hinton, 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 51031, plotted from its record coordinates.

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

Scope ZIP code 51031. 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.