ZIP Code 42066

42066 is one of Kentucky's ZIP codes, delivering to addresses in Mayfield, Graves County.

City: Mayfield
County: Graves County
State: Kentucky
Prefix: 420xx

Where this code sits

42066 is part of the 420xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Mayfield.

Mayfield Kentucky ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 42066 delivers to without sharing its boundary.

ZIP codes nearest 42066

The ZIP codes whose reference points sit closest to 42066.
ZIP code	Distance	Delivers to
ZIP code 42051	8.1 mi	Hickory, KY
ZIP code 42039	8.4 mi	Fancy Farm, KY
ZIP code 42088	8.9 mi	Wingo, KY
ZIP code 42079	12 mi	Sedalia, KY
ZIP code 42040	12 mi	Farmington, KY
ZIP code 42061	13 mi	Lowes, KY
ZIP code 42063	13 mi	Lynnville, KY
ZIP code 42054	13 mi	Kirksey, 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 42066, plotted from its record coordinates.

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

Scope ZIP code 42066. 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.