ZIP Code 41855

41855 is one of Kentucky's ZIP codes, delivering to addresses in Thornton, Letcher County.

City: Thornton
County: Letcher County
State: Kentucky
Prefix: 418xx

Where this code sits

41855 is part of the 418xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Thornton.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 41855 delivers to without sharing its boundary.

606 Area code 606

ZIP codes nearest 41855

The ZIP codes whose reference points sit closest to 41855.
ZIP code	Distance	Delivers to
ZIP code 41838	2.1 mi	Millstone, KY
ZIP code 41815	2.1 mi	Ermine, KY
ZIP code 41849	2.9 mi	Seco, KY
ZIP code 41812	3.6 mi	Deane, KY
ZIP code 41840	4.1 mi	Neon, KY
ZIP code 41825	4.2 mi	Jackhorn, KY
ZIP code 41837	4.8 mi	Mayking, KY
ZIP code 41810	4.9 mi	Cromona, 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 41855, plotted from its record coordinates.

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

Scope ZIP code 41855. 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.