78704 ZIP Code: Austin, Texas
Official postal information, geographic coordinates, USPS post office locations, and US Census Bureau demographic metrics for postal code 78704 in Austin, TX.
Postal & Geographic Specifications USPS Data
Demographic & Economic Profile (US Census Bureau)
American Community Survey (ACS) 5-Year Verified Metrics
Editor's Neighborhood Insight & Local Context
ZIP code 78704 defines Austin’s vibrant cultural and outdoor lifestyle, home to South Congress Avenue, Barton Springs Pool, and Zilker Metropolitan Park.
Designated USPS Post Office Facility Mail & Parcel Drop-off
Mon-Fri 8:30 AM - 5:00 PM; Sat 9:00 AM - 1:00 PM
Geographic Map & Coordinates
30.2458, -97.7669Adjacent & Contiguous ZIP Codes
Nearby postal codes bordering 78704 in Austin
More Postal Codes in Austin, TX
Explore neighboring delivery districts and postal zones
Frequently Asked Questions About 78704 (Austin, TX)
What county is ZIP code 78704 located in for tax and voter purposes? ▾
ZIP code 78704 is located within Travis County, Texas. The official county seat is Austin, and the primary jurisdiction carries Texas FIPS code 48453.
What is the 4-digit ZIP+4 code for 78704? ▾
The full 9-digit postal code format is 78704-XXXX, where the last 4 digits specify exact delivery routes, high-rise buildings, or street blocks. For regular mail and parcel shipping, the 5-digit code 78704 is fully valid, while specific ZIP+4 extensions can be verified with USPS address validation.
Where is the nearest USPS post office for 78704 and what are the lobby hours? ▾
The primary USPS facility serving 78704 is Austin South Congress Post Office, located at 3903 S Congress Ave, Austin, TX 78704. Retail lobby operations run during Mon-Fri 8:30 AM - 5:00 PM; Sat 9:00 AM - 1:00 PM. Contact inquiries can be made at (512) 444-1844.
What telephone area codes and time zone apply to 78704? ▾
ZIP code 78704 is located in the America/Chicago (CST / CDT) time zone (observing Daylight Saving Time). Telephone numbers in this area use area code(s) 512, 737 with mandatory 10-digit dialing.
What is the population and median household income for 78704? ▾
According to U.S. Census Bureau ACS data, ZIP code 78704 in Austin has an estimated population of 48,900 residents and a median household income of $96,800 per year (compared to the Texas state median of $74,640).
What postal codes border 78704 in Austin? ▾
Adjacent and contiguous ZIP codes bordering 78704 include 78701 (Austin, ~2.2 mi), 78702 (Austin, ~3.1 mi), 78703 (Austin, ~3.2 mi), 78705 (Austin, ~3.5 mi).