ZIP Code 81101

81101 is one of Colorado's ZIP codes, delivering to addresses in Alamosa, Alamosa County.

City: Alamosa
County: Alamosa County
State: Colorado
Prefix: 811xx

Where this code sits

81101 is part of the 811xx range, the group of codes handled by one mail processing centre. Alamosa is served by 2 ZIP codes in total; the full list, with the county each falls in, is on the Alamosa page.

Alamosa Colorado ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 81101 delivers to without sharing its boundary.

719 Area code 719

ZIP codes nearest 81101

The ZIP codes whose reference points sit closest to 81101.
ZIP code	Distance	Delivers to
ZIP code 81102	0.4 mi	Alamosa, CO
ZIP code 81146	12 mi	Mosca, CO
ZIP code 81135	14 mi	Homelake, CO
ZIP code 81140	14 mi	La Jara, CO
ZIP code 81151	15 mi	Sanford, CO
ZIP code 81144	16 mi	Monte Vista, CO
ZIP code 81136	18 mi	Hooper, CO
ZIP code 81124	18 mi	Capulin, 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 81101, plotted from its record coordinates.

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

Scope ZIP code 81101. 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.