ZIP Code 42171

42171 is one of Kentucky's ZIP codes, delivering to addresses in Smiths Grove, Warren County.

City: Smiths Grove
County: Warren County
State: Kentucky
Prefix: 421xx

Where this code sits

42171 is part of the 421xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Smiths Grove.

Smiths Grove Kentucky ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 42171 delivers to without sharing its boundary.

ZIP codes nearest 42171

The ZIP codes whose reference points sit closest to 42171.
ZIP code	Distance	Delivers to
ZIP code 42163	3.3 mi	Rocky Hill, KY
ZIP code 42159	5.2 mi	Oakland, KY
ZIP code 42160	8.5 mi	Park City, KY
ZIP code 42128	12 mi	Drake, KY
ZIP code 42210	13 mi	Brownsville, KY
ZIP code 42103	13 mi	Bowling Green, KY
ZIP code 42102	14 mi	Bowling Green, KY
ZIP code 42127	14 mi	Cave City, 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 42171, plotted from its record coordinates.

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

Scope ZIP code 42171. 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.