Ironton Ohio ZIP Codes

Ironton holds a single ZIP code.

Every ZIP code in Ironton

The complete list of Ironton, Ohio ZIP codes with the county each falls in.
ZIP code	County
45638	Lawrence County

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Ironton codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Ironton. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Ironton ZIP code begins 456. Those first three digits identify the sectional center facility that processes mail for this part of Ohio. Statewide that range covers 69 ZIP codes, so Ironton accounts for 1% of it.

Every Ohio ZIP prefix and the region it covers →

Area codes covering Ironton

ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Ironton occupies.

Ironton Ohio area codes in full →

Where Ironton's ZIP codes sit

Each point is one Ironton ZIP code, plotted from its record coordinates.

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

Cities near Ironton

The closest places to Ironton with their own ZIP code list, nearest first.
City	Distance	ZIP codes
South Point Ohio ZIP codes	9.3 mi	1 ZIP code
Chesapeake Ohio ZIP codes	14 mi	1 ZIP code
Proctorville Ohio ZIP codes	17 mi	1 ZIP code
South Webster Ohio ZIP codes	20 mi	1 ZIP code
Miller City Ohio ZIP codes	20 mi	1 ZIP code
Crown City Ohio ZIP codes	21 mi	1 ZIP code
Portsmouth Ohio ZIP codes	21 mi	1 ZIP code
Oak Hill Ohio ZIP codes	26 mi	1 ZIP code

Straight-line distance between place reference points, not driving distance.