ZIP Code 77991

77991 is one of Texas's ZIP codes, delivering to addresses in Vanderbilt, Jackson County.

City: Vanderbilt
County: Jackson County
State: Texas
Prefix: 779xx

Where this code sits

77991 is part of the 779xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Vanderbilt.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 77991 delivers to without sharing its boundary.

361 Area code 361

ZIP codes nearest 77991

The ZIP codes whose reference points sit closest to 77991.
ZIP code	Distance	Delivers to
ZIP code 77969	3.9 mi	La Salle, TX
ZIP code 77971	7.9 mi	Lolita, TX
ZIP code 77970	8.9 mi	La Ward, TX
ZIP code 77978	10 mi	Point Comfort, TX
ZIP code 77957	10 mi	Edna, TX
ZIP code 77968	14 mi	Inez, TX
ZIP code 77979	14 mi	Port Lavaca, TX
ZIP code 77977	16 mi	Placedo, 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 77991, plotted from its record coordinates.

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

Scope ZIP code 77991. 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.