ZIP code 78729: Austin, TX
ZIP code 78729 is in Austin (53% of residents), in Williamson County (92%) and Travis County (7.7%), Texas. 47% of its residents live outside city limits. It is in Texas's 17th congressional district (60%), Texas's 11th congressional district (37%) and Texas's 10th congressional district (3.2%). Its state senate districts are State Senate District 24 (92%) and State Senate District 14 (7.7%); its state house districts are State House District 136 (92%) and State House District 47 (7.7%).
City and county
| City or town | Share of ZIP residents |
|---|---|
| Austin | 53% |
| County | Share of ZIP residents |
|---|---|
| Williamson County | 92% |
| Travis County | 7.7% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Round Rock-Georgetown CCD | 92% |
| Austin CCD | 7.7% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Texas's 17th congressional district (TX-17) | 60% |
| Texas's 11th congressional district (TX-11) | 37% |
| Texas's 10th congressional district (TX-10) | 3.2% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| Mayor | Kirk Watson | 512-978-2100 | 53% |
| U.S. Representative (TX-17) | Pete Sessions (R) | 202-225-6105 | 60% |
| U.S. Representative (TX-11) | August Pfluger (R) | 202-225-3605 | 37% |
| U.S. Representative (TX-10) | Michael T. McCaul (R) | 202-225-2401 | 3.2% |
| U.S. Senator | John Cornyn (R) | 202-224-2934 · contact form | statewide |
| U.S. Senator | Ted Cruz (R) | 202-224-5922 · contact form | statewide |
| State Senator (State Senate District 24) | Pete Flores (R) | 830-896-9816 | 92% |
| State Senator (State Senate District 14) | Sarah Eckhardt (Democratic) | 7.7% | |
| State Representative (State House District 136) | John Bucy (Democratic) | 92% | |
| State Representative (State House District 47) | Vikki Goodwin (Democratic) | 7.7% |
Elected in 2024 under TX's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).
Officials serving now (members of Congress until January 3, 2027). Sources: Mayors: Open States (public domain); State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
Local government
- Austin website: https://austintexas.gov
- Austin laws: search for the Austin, Texas code of ordinances
- Williamson County website: https://www.wilcotx.gov/
- Williamson County laws: search for the Williamson County, Texas code of ordinances
- Travis County website: https://www.traviscountytx.gov/
- Travis County laws: search for the Travis County, Texas code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 24 | 92% |
| State Senate District 14 | 7.7% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 136 | 92% |
| State House District 47 | 7.7% |
Voting precincts
8 voting precincts overlap ZIP 78729. Map them, with each precinct's share of the ZIP's residents.
Get this in your AI agent
Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:78729")
ZIP 78729 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.