ZIP Code 45638

45638 is one of Ohio's ZIP codes, delivering to addresses in Ironton, Lawrence County.

City: Ironton
County: Lawrence County
State: Ohio
Prefix: 456xx

Where this code sits

45638 is part of the 456xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Ironton.

Ironton Ohio ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 45638 delivers to without sharing its boundary.

ZIP codes nearest 45638

The ZIP codes whose reference points sit closest to 45638.
ZIP code	Distance	Delivers to
ZIP code 41169	1.9 mi	Russell, KY
ZIP code 41139	3.1 mi	Flatwoods, KY
ZIP code 41101	4.1 mi	Ashland, KY
ZIP code 41183	4.3 mi	Worthington, KY
ZIP code 45645	6.8 mi	Kitts Hill, OH
ZIP code 45675	7.2 mi	Rock Camp, OH
ZIP code 41102	7.9 mi	Ashland, KY
ZIP code 45659	8.4 mi	Pedro, 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 45638, plotted from its record coordinates.

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

Scope ZIP code 45638. 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.