ZIP code 78201 is in San Antonio (94% of residents) and Balcones Heights (5.9%), in Bexar County, Texas. It is in Texas's 20th congressional district. Its state senate district is State Senate District 26; its state house districts are State House District 116 (63%) and State House District 123 (37%).
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 26
100%
State house district
Share of ZIP residents
State House District 116
63%
State House District 123
37%
Voting precincts
25 voting precincts overlap ZIP 78201.
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:78201")
ZIP 78201 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.