ZIP Code 45231

45231 is one of Ohio's ZIP codes, delivering to addresses in Cincinnati, Hamilton County.

City: Cincinnati
County: Hamilton County
State: Ohio
Prefix: 452xx

Where this code sits

45231 is part of the 452xx range, the group of codes handled by one mail processing centre. Cincinnati is served by 71 ZIP codes in total; the full list, with the county each falls in, is on the Cincinnati page.

Cincinnati Ohio ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 45231 delivers to without sharing its boundary.

ZIP codes nearest 45231

The ZIP codes whose reference points sit closest to 45231.
ZIP code	Distance	Delivers to
ZIP code 45218	2.0 mi	Cincinnati, OH
ZIP code 45299	2.3 mi	Cincinnati, OH
ZIP code 45240	3.1 mi	Cincinnati, OH
ZIP code 45224	3.1 mi	Cincinnati, OH
ZIP code 45239	3.2 mi	Cincinnati, OH
ZIP code 45251	3.5 mi	Cincinnati, OH
ZIP code 45232	4.2 mi	Cincinnati, OH
ZIP code 45216	4.2 mi	Cincinnati, 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 45231, plotted from its record coordinates.

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

Scope ZIP code 45231. 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.