ZIP Code 51578

51578 is one of Iowa's ZIP codes, delivering to addresses in Westphalia, Shelby County.

City: Westphalia
County: Shelby County
State: Iowa
Prefix: 515xx

Where this code sits

51578 is part of the 515xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Westphalia.

Westphalia Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51578 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51578

The ZIP codes whose reference points sit closest to 51578.
ZIP code	Distance	Delivers to
ZIP code 51562	4.8 mi	Panama, IA
ZIP code 51530	5.2 mi	Earling, IA
ZIP code 51527	6.3 mi	Defiance, IA
ZIP code 51447	6.6 mi	Kirkman, IA
ZIP code 51537	6.8 mi	Harlan, IA
ZIP code 51565	7.7 mi	Portsmouth, IA
ZIP code 51446	11 mi	Irwin, IA
ZIP code 51570	13 mi	Shelby, 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 51578, plotted from its record coordinates.

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

Scope ZIP code 51578. 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.