ZIP Code 42040

42040 is one of Kentucky's ZIP codes, delivering to addresses in Farmington, Graves County.

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

Where this code sits

42040 is part of the 420xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Farmington.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 42040 delivers to without sharing its boundary.

ZIP codes nearest 42040

The ZIP codes whose reference points sit closest to 42040.
ZIP code	Distance	Delivers to
ZIP code 42079	3.9 mi	Sedalia, KY
ZIP code 42063	3.9 mi	Lynnville, KY
ZIP code 42054	7.3 mi	Kirksey, KY
ZIP code 42049	11 mi	Hazel, KY
ZIP code 42066	12 mi	Mayfield, KY
ZIP code 42071	12 mi	Murray, KY
ZIP code 42088	12 mi	Wingo, KY
ZIP code 38226	13 mi	Dukedom, TN

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 42040, plotted from its record coordinates.

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

Scope ZIP code 42040. 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.