ZIP Code 51340

51340 is one of Iowa's ZIP codes, delivering to addresses in Fostoria, Clay County.

City: Fostoria
County: Clay County
State: Iowa
Prefix: 513xx

Where this code sits

51340 is part of the 513xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Fostoria.

Fostoria Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51340 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51340

The ZIP codes whose reference points sit closest to 51340.
ZIP code	Distance	Delivers to
ZIP code 51301	4.3 mi	Spencer, IA
ZIP code 51343	5.8 mi	Greenville, IA
ZIP code 51357	6.3 mi	Royal, IA
ZIP code 51341	7.1 mi	Gillett Grove, IA
ZIP code 51333	9.7 mi	Dickens, IA
ZIP code 51338	10 mi	Everly, IA
ZIP code 51366	12 mi	Webb, IA
ZIP code 50585	12 mi	Sioux Rapids, 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 51340, plotted from its record coordinates.

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

Scope ZIP code 51340. 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.