ZIP Code 79831

79831 is one of Texas's ZIP codes, delivering to addresses in Alpine, Brewster County.

City: Alpine
County: Brewster County
State: Texas
Prefix: 798xx

Where this code sits

79831 is part of the 798xx range, the group of codes handled by one mail processing centre. Alpine is served by 3 ZIP codes in total; the full list, with the county each falls in, is on the Alpine page.

Alpine Texas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 79831 delivers to without sharing its boundary.

432 Area code 432

ZIP codes nearest 79831

The ZIP codes whose reference points sit closest to 79831.
ZIP code	Distance	Delivers to
ZIP code 79830	3.2 mi	Alpine, TX
ZIP code 79832	4.0 mi	Alpine, TX
ZIP code 79843	25 mi	Marfa, TX
ZIP code 79734	26 mi	Fort Davis, TX
ZIP code 79842	28 mi	Marathon, TX
ZIP code 79786	45 mi	Toyahvale, TX
ZIP code 79718	47 mi	Balmorhea, TX
ZIP code 79854	53 mi	Valentine, TX

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 79831, plotted from its record coordinates.

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

Scope ZIP code 79831. 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.