ZIP Code 40603

40603 is one of Kentucky's ZIP codes, delivering to addresses in Frankfort, Franklin County.

City: Frankfort
County: Franklin County
State: Kentucky
Prefix: 406xx

Where this code sits

40603 is part of the 406xx range, the group of codes handled by one mail processing centre. Frankfort is served by 9 ZIP codes in total; the full list, with the county each falls in, is on the Frankfort page.

Frankfort Kentucky ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 40603 delivers to without sharing its boundary.

502 Area code 502

ZIP codes nearest 40603

The ZIP codes whose reference points sit closest to 40603.
ZIP code	Distance	Delivers to
ZIP code 40602	0.0 mi	Frankfort, KY
ZIP code 40604	0.0 mi	Frankfort, KY
ZIP code 40618	0.0 mi	Frankfort, KY
ZIP code 40619	0.0 mi	Frankfort, KY
ZIP code 40620	0.0 mi	Frankfort, KY
ZIP code 40601	0.5 mi	Frankfort, KY
ZIP code 40621	2.3 mi	Frankfort, KY
ZIP code 40622	2.3 mi	Frankfort, 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 40603, plotted from its record coordinates.

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

Scope ZIP code 40603. 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.