ZIP Code 66420

66420 is one of Kansas's ZIP codes, delivering to addresses in Dover, Shawnee County.

City: Dover
County: Shawnee County
State: Kansas
Prefix: 664xx

Where this code sits

66420 is part of the 664xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Dover.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 66420 delivers to without sharing its boundary.

785 Area code 785

ZIP codes nearest 66420

The ZIP codes whose reference points sit closest to 66420.
ZIP code	Distance	Delivers to
ZIP code 66402	6.2 mi	Auburn, KS
ZIP code 66507	8.6 mi	Maple Hill, KS
ZIP code 66615	8.8 mi	Topeka, KS
ZIP code 66610	9.3 mi	Topeka, KS
ZIP code 66620	9.6 mi	Topeka, KS
ZIP code 66622	9.6 mi	Topeka, KS
ZIP code 66624	9.6 mi	Topeka, KS
ZIP code 66647	9.6 mi	Topeka, 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 66420, plotted from its record coordinates.

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

Scope ZIP code 66420. 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.