ZIP Code 66842

66842 is one of Kansas's ZIP codes, delivering to addresses in Cassoday, Butler County.

City: Cassoday
County: Butler County
State: Kansas
Prefix: 668xx

Where this code sits

66842 is part of the 668xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Cassoday.

Cassoday Kansas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 66842 delivers to without sharing its boundary.

620 Area code 620

ZIP codes nearest 66842

The ZIP codes whose reference points sit closest to 66842.
ZIP code	Distance	Delivers to
ZIP code 66862	10 mi	Matfield Green, KS
ZIP code 66840	12 mi	Burns, KS
ZIP code 67132	16 mi	Rosalia, KS
ZIP code 67042	17 mi	El Dorado, KS
ZIP code 66843	18 mi	Cedar Point, KS
ZIP code 67123	20 mi	Potwin, KS
ZIP code 66851	20 mi	Florence, KS
ZIP code 67144	24 mi	Towanda, 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 66842, plotted from its record coordinates.

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

Scope ZIP code 66842. 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.