Zip Code 78738 — Austin, TX

ZIP Code 78738 is associated with Austin, TX, in Travis County. The listed population estimate is 31,019; estimated density is 284.5 people per square mile. Among records with population estimates, it ranks #17 of 48 in Travis County and #369 of 1,924 in TX.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (30.306680, -97.990020)

Data MetricLocal Statistic
Postal / Zip Code78738
Primary CityAustin
State / ProvinceTX
CountyTravis
Total Population31,019
Population Density284.5 people/sq mi
TimezoneAmerica/Chicago

How 78738 Compares

MetricZIP 78738Travis County recordsTX records
Population estimate31,0191,401,963 (sum)30,188,035 (sum)
Population Density284.5 /sq mi----
County population rank#17 of 48----
State population rank#369 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 78736Austin4.7 mi9,651
ZIP 78734Austin5.7 mi22,145
ZIP 78733Austin6.8 mi9,029
ZIP 78732Austin7.7 mi21,087
ZIP 78735Austin7.8 mi20,996

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 →