Boundary Atlas

ZIP code 78734: Lakeway, TX

ZIP code 78734 is in Lakeway (53% of residents) and Hudson Bend (17%), in Travis County, Texas. 29% of its residents live outside city limits. It is in Texas's 10th congressional district. Its state senate district is State Senate District 25; its state house districts are State House District 47 (57%) and State House District 19 (43%).

22,963residents (2020 Census)
18.9 sq miland area
3cities and towns
1congressional district
7voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Lakeway53%
Hudson Bend17%
Austin0.8%

CountyShare of ZIP residents
Travis County100%

Town or county subdivisionShare of ZIP residents
Southwest Travis CCD100%

Congressional district

Congressional districtShare of ZIP residents
Texas's 10th congressional district (TX-10)100%

Members of Congress

OfficeMemberContact
U.S. Representative (TX-10)Michael T. McCaul (R)202-225-2401
U.S. SenatorJohn Cornyn (R)202-224-2934 · contact form
U.S. SenatorTed Cruz (R)202-224-5922 · contact form

Elected in 2024 under TX's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).

Members serving now (119th Congress, until January 3, 2027). Source: Members of Congress: the @unitedstates project, congress-legislators (CC0).

State legislative districts

State senate districtShare of ZIP residents
State Senate District 25100%

State house districtShare of ZIP residents
State House District 4757%
State House District 1943%

Voting precincts

7 voting precincts overlap ZIP 78734. 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:78734")

ZIP 78734 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.