Boundary Atlas

ZIP code 78739: Austin, TX

ZIP code 78739 is in Austin (87% of residents) and Shady Hollow (13%), in Travis County (96%) and Hays County (3.6%), Texas. It is in Texas's 27th congressional district (73%) and Texas's 37th congressional district (27%). Its state senate districts are State Senate District 14 (96%) and State Senate District 25 (3.6%); its state house districts are State House District 47 (96%) and State House District 45 (3.6%).

21,854residents (2020 Census)
11.6 sq miland area
2cities and towns
2congressional districts
8voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Austin87%
Shady Hollow13%

CountyShare of ZIP residents
Travis County96%
Hays County3.6%

Town or county subdivisionShare of ZIP residents
Austin CCD96%
Kyle-Buda CCD3.6%

Congressional districts

Congressional districtShare of ZIP residents
Texas's 27th congressional district (TX-27)73%
Texas's 37th congressional district (TX-37)27%

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

OfficeMemberContactShare of residents
MayorKirk Watson512-978-210087%
U.S. Representative (TX-27)Michael Cloud (R)202-225-774273%
U.S. Representative (TX-37)Lloyd Doggett (D)202-225-486527%
U.S. SenatorJohn Cornyn (R)202-224-2934 · contact formstatewide
U.S. SenatorTed Cruz (R)202-224-5922 · contact formstatewide
State Senator (State Senate District 14)Sarah Eckhardt (Democratic)96%
State Senator (State Senate District 25)Donna Campbell (R)830-626-00653.6%
State Representative (State House District 47)Vikki Goodwin (Democratic)96%
State Representative (State House District 45)Erin Zwiener (Democratic)3.6%

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 1496%
State Senate District 253.6%

State house districtShare of ZIP residents
State House District 4796%
State House District 453.6%

Voting precincts

8 voting precincts overlap ZIP 78739. Map them, with each precinct's share of the ZIP's residents.

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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:78739")

ZIP 78739 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.