ZIP Code 51446

51446 is one of Iowa's ZIP codes, delivering to addresses in Irwin, Shelby County.

City: Irwin
County: Shelby County
State: Iowa
Prefix: 514xx

Where this code sits

51446 is part of the 514xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Irwin.

Irwin Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51446 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51446

The ZIP codes whose reference points sit closest to 51446.
ZIP code	Distance	Delivers to
ZIP code 51447	4.9 mi	Kirkman, IA
ZIP code 51454	8.4 mi	Manilla, IA
ZIP code 51527	8.6 mi	Defiance, IA
ZIP code 51432	9.9 mi	Aspinwall, IA
ZIP code 51537	11 mi	Harlan, IA
ZIP code 51578	11 mi	Westphalia, IA
ZIP code 51455	12 mi	Manning, IA
ZIP code 50110	12 mi	Gray, 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 51446, plotted from its record coordinates.

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

Scope ZIP code 51446. 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.