ZIP code 78213: San Antonio, TX
ZIP code 78213 is in San Antonio (90% of residents) and Castle Hills (9.3%), in Bexar County, Texas. It is in Texas's 20th congressional district (60%) and Texas's 21st congressional district (40%). Its state senate district is State Senate District 26; its state house district is State House District 123.
City and county
| City or town | Share of ZIP residents |
|---|---|
| San Antonio | 90% |
| Castle Hills | 9.3% |
| Balcones Heights | 0.7% |
| County | Share of ZIP residents |
|---|---|
| Bexar County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| San Antonio Central CCD | 65% |
| San Antonio North CCD | 35% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Texas's 20th congressional district (TX-20) | 60% |
| Texas's 21st congressional district (TX-21) | 40% |
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 | Gina Ortiz Jones | 90% | |
| U.S. Representative (TX-20) | Joaquin Castro (D) | 202-225-3236 | 60% |
| U.S. Representative (TX-21) | Chip Roy (R) | 202-225-4236 | 40% |
| 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 26) | José Menéndez (Democratic) | 210-733-6604 | 100% |
| State Representative (State House District 123) | Diego Bernal (Democratic) | 210-308-9700 | 100% |
From Wikidata (community-maintained); confirm on the city's website.
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: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0); Mayors: Wikidata (CC0).
Local government
- San Antonio website: https://www.sa.gov/
- San Antonio council: San Antonio City Council
- San Antonio laws: search for the San Antonio, Texas code of ordinances
- Castle Hills website: http://www.cityofcastlehills.com/
- Castle Hills laws: search for the Castle Hills, Texas code of ordinances
- Bexar County website: https://bexar.gov
- Bexar County laws: search for the Bexar County, Texas code of ordinances
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 123 | 100% |
Voting precincts
16 voting precincts overlap ZIP 78213. 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:78213")
ZIP 78213 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.