ZIP Code 40171

40171 is one of Kentucky's ZIP codes, delivering to addresses in Union Star, Breckinridge County.

City: Union Star
County: Breckinridge County
State: Kentucky
Prefix: 401xx

Where this code sits

40171 is part of the 401xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Union Star.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 40171 delivers to without sharing its boundary.

ZIP codes nearest 40171

The ZIP codes whose reference points sit closest to 40171.
ZIP code	Distance	Delivers to
ZIP code 47574	4.3 mi	Rome, IN
ZIP code 40161	4.6 mi	Rhodelia, KY
ZIP code 40170	5.2 mi	Stephensport, KY
ZIP code 40157	5.6 mi	Payneville, KY
ZIP code 40176	6.9 mi	Webster, KY
ZIP code 47525	7.6 mi	Derby, IN
ZIP code 40104	10 mi	Battletown, KY
ZIP code 40146	11 mi	Irvington, 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 40171, plotted from its record coordinates.

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

Scope ZIP code 40171. 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.