ZIP code 78745 is in Austin (98% of residents) and Sunset Valley (1.1%), in Travis County, Texas. It is in Texas's 37th congressional district. Its state senate districts are State Senate District 14 (63%) and State Senate District 21 (37%); its state house districts are State House District 49 (49%), State House District 48 (27%) and State House District 51 (24%).
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 district
Share of ZIP residents
State Senate District 14
63%
State Senate District 21
37%
State house district
Share of ZIP residents
State House District 49
49%
State House District 48
27%
State House District 51
24%
Voting precincts
21 voting precincts overlap ZIP 78745.
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:78745")
ZIP 78745 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.