San Antonio, Texas
San Antonio is a city in Bexar County, Texas, with 1,434,395 residents in 2020. It spans 4 congressional districts: TX-20 (45%), TX-35 (25%), TX-21 (20%) and TX-23 (9.2%). It spans 3 state senate and 10 state house districts.
County
| County | Share of residents |
|---|---|
| Bexar County | 100% |
Congressional districts
| Congressional district | Share of residents |
|---|---|
| Texas's 20th congressional district (TX-20) | 45% |
| Texas's 35th congressional district (TX-35) | 25% |
| Texas's 21st congressional district (TX-21) | 20% |
| Texas's 23rd congressional district (TX-23) | 9.2% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| Mayor | Gina Ortiz Jones | citywide | |
| U.S. Representative (TX-20) | Joaquin Castro (D) | 202-225-3236 | 45% |
| U.S. Representative (TX-35) | Greg Casar (D) | 202-225-5645 | 25% |
| U.S. Representative (TX-21) | Chip Roy (R) | 202-225-4236 | 20% |
| 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 | 56% |
| State Senator (State Senate District 19) | Roland Gutierrez (Democratic) | 830-278-1234 | 27% |
| State Senator (State Senate District 25) | Donna Campbell (R) | 830-626-0065 | 17% |
| State Representative (State House District 116) | Trey Martinez Fischer (Democratic) | 210-733-8391 | 14% |
| State Representative (State House District 123) | Diego Bernal (Democratic) | 210-308-9700 | 13% |
| State Representative (State House District 125) | Ray Lopez (Democratic) | 210-684-5419 | 12% |
| State Representative (State House District 124) | Josey Garcia (Democratic) | 11% | |
| State Representative (State House District 119) | Liz Campos (Democratic) | 210-806-0899 | 11% |
| State Representative (State House District 121) | Marc LaHood (R) | 210-640-1021 | 9.9% |
| State Representative (State House District 120) | Barbara Gervin-Hawkins (Democratic) | 210-822-2534 | 8.7% |
| State Representative (State House District 117) | Philip Cortez (Democratic) | 210-923-3638 | 7.1% |
| State Representative (State House District 122) | Mark Dorazio (R) | 6.7% | |
| State Representative (State House District 118) | John Lujan (R) | 210-595-0068 | 6.7% |
| U.S. Representative (TX-23) | Vacant |
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
- 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 residents |
|---|---|
| State Senate District 26 | 56% |
| State Senate District 19 | 27% |
| State Senate District 25 | 17% |
| State house district | Share of residents |
|---|---|
| State House District 116 | 14% |
| State House District 123 | 13% |
| State House District 125 | 12% |
| State House District 124 | 11% |
| State House District 119 | 11% |
| State House District 121 | 9.9% |
| State House District 120 | 8.7% |
| State House District 117 | 7.1% |
| State House District 122 | 6.7% |
| State House District 118 | 6.7% |
ZIP codes
Percentages mark ZIPs only partly in San Antonio: the share of that ZIP's residents living in it.
- 78023 (38%)
- 78056 (0.2%)
- 78073 (10%)
- 78109 (4.1%)
- 78112 (3.1%)
- 78201 (94%)
- 78202
- 78203
- 78204
- 78205
- 78207
- 78208
- 78209 (71%)
- 78210
- 78211
- 78212 (92%)
- 78213 (90%)
- 78214
- 78215
- 78216 (99%)
- 78217
- 78218
- 78219 (49%)
- 78220 (99%)
- 78221 (91%)
- 78222 (98%)
- 78223 (89%)
- 78224
- 78225
- 78226
- 78227 (98%)
- 78228
- 78229
- 78230 (98%)
- 78231 (76%)
- 78232 (88%)
- 78233 (69%)
- 78234
- 78235
- 78236 (2.9%)
- 78237
- 78238 (72%)
- 78239 (19%)
- 78240 (92%)
- 78242
- 78244 (37%)
- 78245 (36%)
- 78247
- 78248
- 78249 (99%)
- 78250
- 78251 (99%)
- 78252 (34%)
- 78253 (4.0%)
- 78254 (32%)
- 78255 (31%)
- 78256 (93%)
- 78257 (95%)
- 78258 (88%)
- 78259 (85%)
- 78260 (17%)
- 78263 (0.5%)
- 78264 (4.8%)
- 78266 (19%)
Get this in your AI agent
Your agent can get San Antonio's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:place:4865000")
San Antonio here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.