Ohio County ZIP Codes

Ohio County is a county of Kentucky.

ZIP codes: 11
Cities & towns: 11
Area codes: 2
Land area: 587 sq mi

Every ZIP code in Ohio County

423xx

The complete list of Ohio County, KY ZIP codes with the city each one delivers to.
ZIP code	City
42320	Beaver Dam
42328	Centertown
42333	Cromwell
42338	Dundee
42343	Fordsville
42347	Hartford
42349	Horse Branch
42354	Mc Henry
42361	Olaton
42369	Rockport
42370	Rosine

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Ohio County codes above are listed without a column we would have to invent.

Cities and towns in Ohio County

A further 6 places in Ohio County appear in the postal source without a page of its own; their codes are in the table above and each one links to its own page.

Area codes covering Ohio County

Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.

Where Ohio County's ZIP codes sit

Each point is the reference point of one Ohio County ZIP code, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

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

Scope every ZIP code recorded in Ohio County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated 16 July 2026. The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.