Find the last 4 digits (ZIP+4) for an address in 78721

ZIP 78721, Austin, TX is filled in. Just type the street address.

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ZIP Code 78721 – Austin, TX

Austin, Texas · Travis County · Central time

ZIP code78721
CityAustin
StateTexas
CountyTravis County
Population10,997
Time zoneCentral · local time
ZIP typeStandard (has a Census ZCTA area)
Land area3.57 sq mi
Center (lat, long)30.2713, -97.6835

Area codes in this area

512737

These are the area codes that most often serve ZIP 78721 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

78702 Austin · 1.9 mi78722 Austin · 2.3 mi78723 Austin · 2.3 mi78742 Austin · 2.5 mi78712 Austin · 3.1 mi78741 Austin · 3.4 mi78701 Austin · 3.5 mi78713 Austin · 3.6 mi

About ZIP 78721

ZIP code 78721 is assigned to Austin, Texas. It lies in Travis County. Its Census area covers about 3.57 square miles of land. The closest neighboring ZIP is 78702 (Austin), about 1.9 miles away.

Every address in 78721 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources