ZIP Code 78644

78644 is one of Texas's ZIP codes, delivering to addresses in Lockhart, Caldwell County.

City: Lockhart
County: Caldwell County
State: Texas
Prefix: 786xx

Where this code sits

78644 is part of the 786xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Lockhart.

Lockhart Texas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78644 delivers to without sharing its boundary.

ZIP codes nearest 78644

The ZIP codes whose reference points sit closest to 78644.
ZIP code	Distance	Delivers to
ZIP code 78616	7.3 mi	Dale, TX
ZIP code 78656	8.3 mi	Maxwell, TX
ZIP code 78622	11 mi	Fentress, TX
ZIP code 78655	11 mi	Martindale, TX
ZIP code 78670	12 mi	Staples, TX
ZIP code 78661	12 mi	Prairie Lea, TX
ZIP code 78640	12 mi	Kyle, TX
ZIP code 78648	14 mi	Luling, 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 78644, plotted from its record coordinates.

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

Scope ZIP code 78644. 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.