What county is ZIP code 78759 in?
Updated · Data: U.S. Census Bureau
ZIP code 78759 (Austin, TX) is mostly in Travis County (98.9% of its land), with parts in Williamson County.
Which counties is ZIP 78759 in?
| County | Share of land area | Chart |
|---|---|---|
| Travis County | 98.9% | |
| Williamson County | 1.1% |
About 44,882 people live in this ZIP code area. Because it crosses a county line, the county depends on the street: check your address.
Is ZIP 78759 a Census ZIP code area?
Yes. A ZIP Code Tabulation Area (ZCTA) is the Census version of a ZIP code; its edges can differ from USPS delivery routes (ZIP code vs ZCTA). Look up another ZIP on the ZIP code to county lookup.
Sources: Census 2020 ZCTA-county relationship file; Gazetteer 2024; GeoNames (CC BY 4.0, post office name); ACS 2019-2023 5-year. Data as of November 1, 2026. Not affiliated with USPS or any government agency.
FAQ
Frequently asked questions
What county is ZIP code 78759 in?
Is ZIP 78759 in Williamson County?
What city is ZIP 78759?
Free · No signup · Private
Find your county now
Use your location, a city or a ZIP code. The check runs on your device; your location is never sent or stored.