Zip Code 78721 — Austin, TX
78721 is a ZIP Code associated with Austin, TX, located within Travis. 78721 ranks #38 out of 48 ZIP codes in Travis County by population (and #786 out of 1,990 in TX). The area supports an estimated population of 10,997 residents across Data Pending housing units, with a population density of 1,190.1 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (30.271270, -97.683450)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 78721 |
| Primary City | Austin |
| State / Province | TX |
| County | Travis |
| Total Population | 10,997 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 1,190.1 people/sq mi |
| Timezone | America/Chicago |
How 78721 Compares
| Metric | ZIP 78721 | Travis County | TX State Average |
|---|
| Population | 10,997 | 1,401,963 (Total) | 30,188,035 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 1,190.1 /sq mi | -- | -- |
| County Pop Rank | #38 of 48 | -- | -- |
Nearby ZIP Codes
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 →