ZIP Code 80428

80428 is one of Colorado's ZIP codes, delivering to addresses in Clark, Routt County.

City: Clark
County: Routt County
State: Colorado
Prefix: 804xx

Where this code sits

80428 is part of the 804xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Clark.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 80428 delivers to without sharing its boundary.

ZIP codes nearest 80428

The ZIP codes whose reference points sit closest to 80428.
ZIP code	Distance	Delivers to
ZIP code 80487	6.5 mi	Steamboat Springs, CO
ZIP code 80488	8.1 mi	Steamboat Springs, CO
ZIP code 80477	17 mi	Steamboat Springs, CO
ZIP code 81639	24 mi	Hayden, CO
ZIP code 80430	24 mi	Coalmont, CO
ZIP code 81653	29 mi	Slater, CO
ZIP code 80467	33 mi	Oak Creek, CO
ZIP code 80434	33 mi	Cowdrey, CO

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 80428, plotted from its record coordinates.

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

Scope ZIP code 80428. 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.