ZIP Code 78643

78643 is one of Texas's ZIP codes, delivering to addresses in Llano, Llano County.

City: Llano
County: Llano County
State: Texas
Prefix: 786xx

Where this code sits

78643 is part of the 786xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Llano.

Llano Texas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78643 delivers to without sharing its boundary.

325 Area code 325

ZIP codes nearest 78643

The ZIP codes whose reference points sit closest to 78643.
ZIP code	Distance	Delivers to
ZIP code 78607	9.5 mi	Bluffton, TX
ZIP code 78639	10 mi	Kingsland, TX
ZIP code 78609	11 mi	Buchanan Dam, TX
ZIP code 78672	14 mi	Tow, TX
ZIP code 76885	17 mi	Valley Spring, TX
ZIP code 78675	18 mi	Willow City, TX
ZIP code 78657	18 mi	Horseshoe Bay, TX
ZIP code 76832	19 mi	Cherokee, 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 78643, plotted from its record coordinates.

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

Scope ZIP code 78643. 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.