ZIP Code 81138

81138 is one of Colorado's ZIP codes, delivering to addresses in Jaroso, Costilla County.

City: Jaroso
County: Costilla County
State: Colorado
Prefix: 811xx

Where this code sits

81138 is part of the 811xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Jaroso.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 81138 delivers to without sharing its boundary.

719 Area code 719

ZIP codes nearest 81138

The ZIP codes whose reference points sit closest to 81138.
ZIP code	Distance	Delivers to
ZIP code 87524	5.5 mi	Costilla, NM
ZIP code 87512	10 mi	Amalia, NM
ZIP code 81152	11 mi	San Luis, CO
ZIP code 87519	17 mi	Cerro, NM
ZIP code 81126	18 mi	Chama, CO
ZIP code 81141	21 mi	Manassa, CO
ZIP code 87556	21 mi	Questa, NM
ZIP code 81148	23 mi	Romeo, 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 81138, plotted from its record coordinates.

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

Scope ZIP code 81138. 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.