ZIP Code 45146

45146 is one of Ohio's ZIP codes, delivering to addresses in Martinsville, Clinton County.

City: Martinsville
County: Clinton County
State: Ohio
Prefix: 451xx

Where this code sits

45146 is part of the 451xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Martinsville.

Martinsville Ohio ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 45146 delivers to without sharing its boundary.

ZIP codes nearest 45146

The ZIP codes whose reference points sit closest to 45146.
ZIP code	Distance	Delivers to
ZIP code 45114	4.3 mi	Cuba, OH
ZIP code 45148	5.2 mi	Midland, OH
ZIP code 45159	6.2 mi	New Vienna, OH
ZIP code 45142	7.0 mi	Lynchburg, OH
ZIP code 45107	9.3 mi	Blanchester, OH
ZIP code 45177	9.7 mi	Wilmington, OH
ZIP code 45113	11 mi	Clarksville, OH
ZIP code 45132	11 mi	Highland, 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 45146, plotted from its record coordinates.

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

Scope ZIP code 45146. 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.