ZIP Code 78657

78657 is one of Texas's ZIP codes, delivering to addresses in Horseshoe Bay, Llano County.

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

Where this code sits

78657 is part of the 786xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Horseshoe Bay.

Horseshoe Bay Texas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78657 delivers to without sharing its boundary.

830 Area code 830

ZIP codes nearest 78657

The ZIP codes whose reference points sit closest to 78657.
ZIP code	Distance	Delivers to
ZIP code 78654	6.3 mi	Marble Falls, TX
ZIP code 78663	7.9 mi	Round Mountain, TX
ZIP code 78639	9.5 mi	Kingsland, TX
ZIP code 78609	15 mi	Buchanan Dam, TX
ZIP code 78636	17 mi	Johnson City, TX
ZIP code 78611	17 mi	Burnet, TX
ZIP code 78675	18 mi	Willow City, TX
ZIP code 78643	18 mi	Llano, 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 78657, plotted from its record coordinates.

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

Scope ZIP code 78657. 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.