ZIP Code 42156

42156 is one of Kentucky's ZIP codes, delivering to addresses in Lucas, Barren County.

City: Lucas
County: Barren County
State: Kentucky
Prefix: 421xx

Where this code sits

42156 is part of the 421xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Lucas.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 42156 delivers to without sharing its boundary.

ZIP codes nearest 42156

The ZIP codes whose reference points sit closest to 42156.
ZIP code	Distance	Delivers to
ZIP code 42123	4.6 mi	Austin, KY
ZIP code 42131	7.9 mi	Etoile, KY
ZIP code 42164	10 mi	Scottsville, KY
ZIP code 42133	11 mi	Fountain Run, KY
ZIP code 42141	12 mi	Glasgow, KY
ZIP code 42142	13 mi	Glasgow, KY
ZIP code 42153	13 mi	Holland, KY
ZIP code 42157	14 mi	Mount Hermon, 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 42156, plotted from its record coordinates.

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

Scope ZIP code 42156. 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.