ZIP Code 66604

66604 is one of Kansas's ZIP codes, delivering to addresses in Topeka, Shawnee County.

City: Topeka
County: Shawnee County
State: Kansas
Prefix: 666xx

Where this code sits

66604 is part of the 666xx range, the group of codes handled by one mail processing centre. Topeka is served by 31 ZIP codes in total; the full list, with the county each falls in, is on the Topeka page.

Topeka Kansas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 66604 delivers to without sharing its boundary.

785 Area code 785

ZIP codes nearest 66604

The ZIP codes whose reference points sit closest to 66604.
ZIP code	Distance	Delivers to
ZIP code 66621	1.0 mi	Topeka, KS
ZIP code 66606	1.3 mi	Topeka, KS
ZIP code 66612	1.9 mi	Topeka, KS
ZIP code 66611	2.1 mi	Topeka, KS
ZIP code 66601	2.2 mi	Topeka, KS
ZIP code 66625	2.2 mi	Topeka, KS
ZIP code 66626	2.2 mi	Topeka, KS
ZIP code 66629	2.2 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 66604, plotted from its record coordinates.

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

Scope ZIP code 66604. 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.