ZIP Code 45812

45812 is one of Ohio's ZIP codes, delivering to addresses in Alger, Hardin County.

City: Alger
County: Hardin County
State: Ohio
Prefix: 458xx

Where this code sits

45812 is part of the 458xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Alger.

Alger Ohio ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 45812 delivers to without sharing its boundary.

ZIP codes nearest 45812

The ZIP codes whose reference points sit closest to 45812.
ZIP code	Distance	Delivers to
ZIP code 45859	1.3 mi	Mc Guffey, OH
ZIP code 45810	4.5 mi	Ada, OH
ZIP code 45850	6.3 mi	Harrod, OH
ZIP code 45854	7.5 mi	Lafayette, OH
ZIP code 45835	7.5 mi	Dola, OH
ZIP code 43346	9.2 mi	Roundhead, OH
ZIP code 45896	9.8 mi	Waynesfield, OH
ZIP code 45836	11 mi	Dunkirk, 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 45812, plotted from its record coordinates.

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

Scope ZIP code 45812. 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.