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Zip Code 78731 — Austin, TX

78731 is a ZIP Code associated with Austin, TX, located within Travis. The postal region supports an estimated population of 27,507 residents across Data Pending housing units, with a population density of 1,214.4 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (30.347660, -97.768700)

Data MetricLocal Statistic
Postal / Zip Code78731
Primary CityAustin
State / ProvinceTX
CountyTravis
Total Population27,507
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density1,214.4 people/sq mi
TimezoneAmerica/Chicago

How 78731 Compares

MetricZIP 78731Travis CountyTX State Average
Population27,5071,401,96330,188,035
Median IncomeData PendingN/AN/A
Population Density1,214.4 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 78757Austin2.2 mi23,856N/A
Zip 78756Austin2.4 mi9,197N/A
Zip 78703Austin3.7 mi23,483N/A
Zip 78751Austin3.7 mi16,961N/A
Zip 78759Austin3.8 mi43,182N/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 →