ZIP Code 51523

51523 is one of Iowa's ZIP codes, delivering to addresses in Blencoe, Monona County.

City: Blencoe
County: Monona County
State: Iowa
Prefix: 515xx

Where this code sits

51523 is part of the 515xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Blencoe.

Blencoe Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51523 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51523

The ZIP codes whose reference points sit closest to 51523.
ZIP code	Distance	Delivers to
ZIP code 51040	7.9 mi	Onawa, IA
ZIP code 51545	8.4 mi	Little Sioux, IA
ZIP code 68020	10 mi	Decatur, NE
ZIP code 51564	11 mi	Pisgah, IA
ZIP code 68061	12 mi	Tekamah, NE
ZIP code 51558	13 mi	Moorhead, IA
ZIP code 51010	14 mi	Castana, IA
ZIP code 51557	15 mi	Mondamin, 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 51523, plotted from its record coordinates.

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

Scope ZIP code 51523. 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.