ZIP Code 40734

40734 is one of Kentucky's ZIP codes, delivering to addresses in Gray, Knox County.

City: Gray
County: Knox County
State: Kentucky
Prefix: 407xx

Where this code sits

40734 is part of the 407xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Gray.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 40734 delivers to without sharing its boundary.

606 Area code 606

ZIP codes nearest 40734

The ZIP codes whose reference points sit closest to 40734.
ZIP code	Distance	Delivers to
ZIP code 40740	6.0 mi	Lily, KY
ZIP code 40701	6.6 mi	Corbin, KY
ZIP code 40702	6.7 mi	Corbin, KY
ZIP code 40771	6.7 mi	Woodbine, KY
ZIP code 40949	7.3 mi	Heidrick, KY
ZIP code 40943	7.3 mi	Girdler, KY
ZIP code 40923	7.5 mi	Cannon, KY
ZIP code 40906	7.6 mi	Barbourville, 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 40734, plotted from its record coordinates.

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

Scope ZIP code 40734. 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.