ZIP Code 42120

42120 is one of Kentucky's ZIP codes, delivering to addresses in Adolphus, Allen County.

City: Adolphus
County: Allen County
State: Kentucky
Prefix: 421xx

Where this code sits

42120 is part of the 421xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Adolphus.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 42120 delivers to without sharing its boundary.

ZIP codes nearest 42120

The ZIP codes whose reference points sit closest to 42120.
ZIP code	Distance	Delivers to
ZIP code 42164	7.0 mi	Scottsville, KY
ZIP code 37186	7.2 mi	Westmoreland, TN
ZIP code 37022	11 mi	Bethpage, TN
ZIP code 42153	12 mi	Holland, KY
ZIP code 42122	14 mi	Alvaton, KY
ZIP code 37148	15 mi	Portland, TN
ZIP code 37119	16 mi	Mitchellville, TN
ZIP code 37083	16 mi	Lafayette, TN

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 42120, plotted from its record coordinates.

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

Scope ZIP code 42120. 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.