ZIP Code 42431

42431 is one of Kentucky's ZIP codes, delivering to addresses in Madisonville, Hopkins County.

City: Madisonville
County: Hopkins County
State: Kentucky
Prefix: 424xx

Where this code sits

42431 is part of the 424xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Madisonville.

Madisonville Kentucky ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 42431 delivers to without sharing its boundary.

ZIP codes nearest 42431

The ZIP codes whose reference points sit closest to 42431.
ZIP code	Distance	Delivers to
ZIP code 42410	3.7 mi	Earlington, KY
ZIP code 42440	5.6 mi	Mortons Gap, KY
ZIP code 42436	6.8 mi	Manitou, KY
ZIP code 42413	7.9 mi	Hanson, KY
ZIP code 42442	10 mi	Nortonville, KY
ZIP code 42441	11 mi	Nebo, KY
ZIP code 42453	12 mi	Saint Charles, KY
ZIP code 42344	12 mi	Graham, KY

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 42431, plotted from its record coordinates.

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

Scope ZIP code 42431. 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.