ZIP Code 51527

51527 is one of Iowa's ZIP codes, delivering to addresses in Defiance, Shelby County.

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

Where this code sits

51527 is part of the 515xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Defiance.

Defiance Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51527 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51527

The ZIP codes whose reference points sit closest to 51527.
ZIP code	Distance	Delivers to
ZIP code 51530	3.6 mi	Earling, IA
ZIP code 51578	6.3 mi	Westphalia, IA
ZIP code 51447	6.8 mi	Kirkman, IA
ZIP code 51454	8.4 mi	Manilla, IA
ZIP code 51446	8.6 mi	Irwin, IA
ZIP code 51562	8.7 mi	Panama, IA
ZIP code 51528	10 mi	Dow City, IA
ZIP code 51537	11 mi	Harlan, 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 51527, plotted from its record coordinates.

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

Scope ZIP code 51527. 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.