ZIP Code 42728

42728 is one of Kentucky's ZIP codes, delivering to addresses in Columbia, Adair County.

City: Columbia
County: Adair County
State: Kentucky
Prefix: 427xx

Where this code sits

42728 is part of the 427xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Columbia.

Columbia Kentucky ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 42728 delivers to without sharing its boundary.

ZIP codes nearest 42728

The ZIP codes whose reference points sit closest to 42728.
ZIP code	Distance	Delivers to
ZIP code 42720	5.3 mi	Cane Valley, KY
ZIP code 42741	7.6 mi	Glens Fork, KY
ZIP code 42753	9.5 mi	Knifley, KY
ZIP code 42742	11 mi	Gradyville, KY
ZIP code 42642	13 mi	Russell Springs, KY
ZIP code 42715	14 mi	Breeding, KY
ZIP code 42629	14 mi	Jamestown, KY
ZIP code 42719	16 mi	Campbellsville, 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 42728, plotted from its record coordinates.

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

Scope ZIP code 42728. 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.