ZIP Code 45870

45870 is one of Ohio's ZIP codes, delivering to addresses in New Hampshire, Auglaize County.

City: New Hampshire
County: Auglaize County
State: Ohio
Prefix: 458xx

Where this code sits

45870 is part of the 458xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to New Hampshire.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 45870 delivers to without sharing its boundary.

ZIP codes nearest 45870

The ZIP codes whose reference points sit closest to 45870.
ZIP code	Distance	Delivers to
ZIP code 45896	3.5 mi	Waynesfield, OH
ZIP code 43331	4.1 mi	Lakeview, OH
ZIP code 43346	5.6 mi	Roundhead, OH
ZIP code 45884	6.9 mi	Saint Johns, OH
ZIP code 43348	7.0 mi	Russells Point, OH
ZIP code 45888	7.7 mi	Uniopolis, OH
ZIP code 43333	9.0 mi	Lewistown, OH
ZIP code 45334	9.7 mi	Jackson Center, 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 45870, plotted from its record coordinates.

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

Scope ZIP code 45870. 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.