ZIP Code 66427

66427 is one of Kansas's ZIP codes, delivering to addresses in Frankfort, Marshall County.

City: Frankfort
County: Marshall County
State: Kansas
Prefix: 664xx

Where this code sits

66427 is part of the 664xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Frankfort.

Frankfort Kansas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 66427 delivers to without sharing its boundary.

785 Area code 785

ZIP codes nearest 66427

The ZIP codes whose reference points sit closest to 66427.
ZIP code	Distance	Delivers to
ZIP code 66411	7.3 mi	Blue Rapids, KS
ZIP code 66438	8.0 mi	Home, KS
ZIP code 66508	9.9 mi	Marysville, KS
ZIP code 66548	12 mi	Waterville, KS
ZIP code 66406	13 mi	Beattie, KS
ZIP code 66544	13 mi	Vermillion, KS
ZIP code 66412	16 mi	Bremen, KS
ZIP code 66403	17 mi	Axtell, KS

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 66427, plotted from its record coordinates.

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

Scope ZIP code 66427. 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.