ZIP Code 45042

45042 is one of Ohio's ZIP codes, delivering to addresses in Middletown, Butler County.

City: Middletown
County: Butler County
State: Ohio
Prefix: 450xx

Where this code sits

45042 is part of the 450xx range, the group of codes handled by one mail processing centre. Middletown is served by 2 ZIP codes in total; the full list, with the county each falls in, is on the Middletown page.

Middletown Ohio ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 45042 delivers to without sharing its boundary.

ZIP codes nearest 45042

The ZIP codes whose reference points sit closest to 45042.
ZIP code	Distance	Delivers to
ZIP code 45044	1.3 mi	Middletown, OH
ZIP code 45005	4.6 mi	Franklin, OH
ZIP code 45067	5.2 mi	Trenton, OH
ZIP code 45050	6.4 mi	Monroe, OH
ZIP code 45327	6.4 mi	Germantown, OH
ZIP code 45055	8.7 mi	Overpeck, OH
ZIP code 45066	8.8 mi	Springboro, OH
ZIP code 45062	9.4 mi	Seven Mile, 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 45042, plotted from its record coordinates.

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

Scope ZIP code 45042. 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.