Kentucky ZIP Codes

ZIP codes: 946
Cities & towns: 785
Counties: 120
Area codes: 5

How Kentucky ZIP codes are numbered

400xx–427xx

The first three digits identify the sectional center facility that processes mail for a region, so a Kentucky ZIP code can be placed geographically from its prefix alone. Each row names the city holding the most codes in that prefix.

Kentucky three-digit ZIP prefixes, the codes in each, and the city that holds the most of them.
Prefix	ZIP codes	Main area
400xx	54	La Grange
401xx	36	Fort Knox
402xx	66	Louisville
403xx	47	Nicholasville
404xx	33	Berea
405xx	39	Lexington
406xx	9	Frankfort
407xx	19	London
408xx	37	Ages Brookside
409xx	35	Arjay
410xx	68	Covington
411xx	32	Ashland
412xx	29	Adams
413xx	21	Bays
414xx	10	Cannel City
415xx	43	Pikeville
416xx	34	Allen
417xx	36	Hazard
418xx	33	Blackey
420xx	52	Paducah
421xx	33	Bowling Green
422xx	36	Hopkinsville
423xx	45	Owensboro
424xx	32	Henderson
425xx	17	Somerset
426xx	12	Albany
427xx	38	Campbellsville

Where Kentucky's communities sit

Each point is a Kentucky community with a published ZIP code list, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

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

Kentucky cities by ZIP code count

largest 25

Area codes serving Kentucky

Scope every ZIP code recorded in Kentucky. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. The map outline is a convex envelope of published places, not a state boundary.