ZIP Code 43512

43512 is one of Ohio's ZIP codes, delivering to addresses in Defiance, Defiance County.

City: Defiance
County: Defiance County
State: Ohio
Prefix: 435xx

Where this code sits

43512 is part of the 435xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Defiance.

Defiance Ohio ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 43512 delivers to without sharing its boundary.

ZIP codes nearest 43512

The ZIP codes whose reference points sit closest to 43512.
ZIP code	Distance	Delivers to
ZIP code 43530	5.4 mi	Jewell, OH
ZIP code 43556	9.4 mi	Sherwood, OH
ZIP code 43519	10 mi	Evansport, OH
ZIP code 43549	11 mi	Ney, OH
ZIP code 43548	11 mi	New Bavaria, OH
ZIP code 43527	11 mi	Holgate, OH
ZIP code 43555	12 mi	Ridgeville Corners, OH
ZIP code 45831	13 mi	Continental, OH

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 43512, plotted from its record coordinates.

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

Scope ZIP code 43512. 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.