ZIP Code 80543

80543 is one of Colorado's ZIP codes, delivering to addresses in Milliken, Weld County.

City: Milliken
County: Weld County
State: Colorado
Prefix: 805xx

Where this code sits

80543 is part of the 805xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Milliken.

Milliken Colorado ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 80543 delivers to without sharing its boundary.

ZIP codes nearest 80543

The ZIP codes whose reference points sit closest to 80543.
ZIP code	Distance	Delivers to
ZIP code 80534	3.6 mi	Johnstown, CO
ZIP code 80623	4.9 mi	Gilcrest, CO
ZIP code 80632	5.9 mi	Greeley, CO
ZIP code 80645	6.8 mi	La Salle, CO
ZIP code 80634	7.7 mi	Greeley, CO
ZIP code 80651	8.5 mi	Platteville, CO
ZIP code 80620	9.0 mi	Evans, CO
ZIP code 80639	9.4 mi	Greeley, 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 80543, plotted from its record coordinates.

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

Scope ZIP code 80543. 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.