Home > TX > Caldwell County > Martindale > Zip 78655

Zip Code 78655 — Martindale, TX

78655 is a ZIP Code associated with Martindale, TX, located within Caldwell. The postal region supports an estimated population of 3,730 residents across Data Pending housing units, with a population density of 50.2 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (29.823460, -97.835170)

Data MetricLocal Statistic
Postal / Zip Code78655
Primary CityMartindale
State / ProvinceTX
CountyCaldwell
Total Population3,730
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density50.2 people/sq mi
TimezoneAmerica/Chicago

How 78655 Compares

MetricZIP 78655Caldwell CountyTX State Average
Population3,73048,63730,188,035
Median IncomeData PendingN/AN/A
Population Density50.2 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 78670Staples4.3 mi130N/A
Zip 78622Fentress4.8 mi331N/A
Zip 78656Maxwell5.7 mi2,847N/A
Zip 78661Prairie Lea8.6 mi835N/A
Zip 78666San Marcos9.6 mi88,583N/A

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 →