ZIP Code 78609

78609 is one of Texas's ZIP codes, delivering to addresses in Buchanan Dam, Llano County.

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

Where this code sits

78609 is part of the 786xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Buchanan Dam.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78609 delivers to without sharing its boundary.

ZIP codes nearest 78609

The ZIP codes whose reference points sit closest to 78609.
ZIP code	Distance	Delivers to
ZIP code 78639	6.1 mi	Kingsland, TX
ZIP code 78607	7.1 mi	Bluffton, TX
ZIP code 78672	7.6 mi	Tow, TX
ZIP code 78611	9.9 mi	Burnet, TX
ZIP code 78643	11 mi	Llano, TX
ZIP code 78657	15 mi	Horseshoe Bay, TX
ZIP code 78654	15 mi	Marble Falls, TX
ZIP code 76832	21 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 78609, plotted from its record coordinates.

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

Scope ZIP code 78609. 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.