ZIP Code 78673

78673 is one of Texas's ZIP codes, delivering to addresses in Walburg, Williamson County.

City: Walburg
County: Williamson County
State: Texas
Prefix: 786xx

Where this code sits

78673 is part of the 786xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Walburg.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78673 delivers to without sharing its boundary.

ZIP codes nearest 78673

The ZIP codes whose reference points sit closest to 78673.
ZIP code	Distance	Delivers to
ZIP code 78674	4.6 mi	Weir, TX
ZIP code 76537	4.9 mi	Jarrell, TX
ZIP code 78680	5.9 mi	Round Rock, TX
ZIP code 78682	5.9 mi	Round Rock, TX
ZIP code 78683	5.9 mi	Round Rock, TX
ZIP code 76573	6.8 mi	Schwertner, TX
ZIP code 76530	8.6 mi	Granger, TX
ZIP code 78626	8.9 mi	Georgetown, 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 78673, plotted from its record coordinates.

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

Scope ZIP code 78673. 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.