Home > TX > Llano County > Castell > Zip 76831

Zip Code 76831 — Castell, TX

76831 is a ZIP Code associated with Castell, TX, located within Llano. The postal region supports an estimated population of Data Pending residents across Data Pending housing units, with a population density of Data Pending people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (30.745990, -98.955430)

Data MetricLocal Statistic
Postal / Zip Code76831
Primary CityCastell
State / ProvinceTX
CountyLlano
Total PopulationData Pending
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population DensityData Pending people/sq mi
TimezoneAmerica/Chicago

How 76831 Compares

MetricZIP 76831Llano CountyTX State Average
PopulationData Pending26,21130,188,035
Median IncomeData PendingN/AN/A
Population DensityData Pending /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 76820Art6.2 mi104N/A
Zip 76885Valley Spring10.5 mi142N/A
Zip 76869Pontotoc11.4 miN/AN/A
Zip 76842Fredonia14.8 mi297N/A
Zip 78643Llano15.1 mi7,088N/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 →