ZIP Code 81621

81621 is one of Colorado's ZIP codes, delivering to addresses in Basalt, Eagle County.

City: Basalt
County: Eagle County
State: Colorado
Prefix: 816xx

Where this code sits

81621 is part of the 816xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Basalt.

Basalt Colorado ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 81621 delivers to without sharing its boundary.

ZIP codes nearest 81621

The ZIP codes whose reference points sit closest to 81621.
ZIP code	Distance	Delivers to
ZIP code 81656	7.2 mi	Woody Creek, CO
ZIP code 81654	9.0 mi	Snowmass, CO
ZIP code 81615	9.8 mi	Snowmass Village, CO
ZIP code 81612	11 mi	Aspen, CO
ZIP code 81623	13 mi	Carbondale, CO
ZIP code 81611	14 mi	Aspen, CO
ZIP code 81642	18 mi	Meredith, CO
ZIP code 81601	21 mi	Glenwood Springs, 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 81621, plotted from its record coordinates.

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

Scope ZIP code 81621. 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.