ZIP Code 51577

51577 is one of Iowa's ZIP codes, delivering to addresses in Walnut, Pottawattamie County.

City: Walnut
County: Pottawattamie County
State: Iowa
Prefix: 515xx

Where this code sits

51577 is part of the 515xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Walnut.

Walnut Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51577 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51577

The ZIP codes whose reference points sit closest to 51577.
ZIP code	Distance	Delivers to
ZIP code 51552	6.3 mi	Marne, IA
ZIP code 51521	7.0 mi	Avoca, IA
ZIP code 51593	7.9 mi	Harlan, IA
ZIP code 51536	8.5 mi	Hancock, IA
ZIP code 51531	11 mi	Elk Horn, IA
ZIP code 50022	12 mi	Atlantic, IA
ZIP code 51570	13 mi	Shelby, IA
ZIP code 51560	13 mi	Oakland, 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 51577, plotted from its record coordinates.

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

Scope ZIP code 51577. 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.