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Zip Code 78644 — Lockhart, TX

ZIP Code 78644 is associated with Lockhart, TX, in Caldwell County. The listed population estimate is 22,348; estimated density is 48.0 people per square mile. Among records with population estimates, it ranks #1 of 7 in Caldwell County and #541 of 1,924 in TX.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (29.871110, -97.672920)

Data MetricLocal Statistic
Postal / Zip Code78644
Primary CityLockhart
State / ProvinceTX
CountyCaldwell
Total Population22,348
Population Density48.0 people/sq mi
TimezoneAmerica/Chicago

How 78644 Compares

MetricZIP 78644Caldwell County recordsTX records
Population estimate22,34848,637 (sum)30,188,035 (sum)
Population Density48.0 /sq mi----
County population rank#1 of 7----
State population rank#541 of 1,924----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in TX

ZIP CodeCityDistancePopulation estimate
ZIP 78616Dale8.0 mi10,683
ZIP 78656Maxwell8.4 mi2,847
ZIP 78622Fentress9.5 mi331
ZIP 78655Martindale10.3 mi3,730
ZIP 78661Prairie Lea10.6 mi835

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →