ZIP Code 42166

42166 is one of Kentucky's ZIP codes, delivering to addresses in Summer Shade, Metcalfe County.

City: Summer Shade
County: Metcalfe County
State: Kentucky
Prefix: 421xx

Where this code sits

42166 is part of the 421xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Summer Shade.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 42166 delivers to without sharing its boundary.

ZIP codes nearest 42166

The ZIP codes whose reference points sit closest to 42166.
ZIP code	Distance	Delivers to
ZIP code 42124	3.8 mi	Beaumont, KY
ZIP code 42130	4.1 mi	Eighty Eight, KY
ZIP code 42129	9.5 mi	Edmonton, KY
ZIP code 42157	10 mi	Mount Hermon, KY
ZIP code 42167	11 mi	Tompkinsville, KY
ZIP code 42154	12 mi	Knob Lick, KY
ZIP code 42759	12 mi	Marrowbone, KY
ZIP code 42131	13 mi	Etoile, 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 42166, plotted from its record coordinates.

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

Scope ZIP code 42166. 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.