ZIP code 78251: San Antonio, TX
ZIP code 78251 is in San Antonio (99% of residents), in Bexar County, Texas. It is in Texas's 20th congressional district (100%) and Texas's 23rd congressional district (<0.1%). Its state senate districts are State Senate District 26 (67%) and State Senate District 19 (33%); its state house districts are State House District 124 (98%) and State House District 117 (1.9%).
City and county
| City or town | Share of ZIP residents |
|---|---|
| San Antonio | 99% |
| County | Share of ZIP residents |
|---|---|
| Bexar County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| San Antonio West CCD | 88% |
| San Antonio Northwest CCD | 12% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Texas's 20th congressional district (TX-20) | 100% |
| Texas's 23rd congressional district (TX-23) | <0.1% |
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 | 99% | |
| U.S. Representative (TX-20) | Joaquin Castro (D) | 202-225-3236 | 100% |
| 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 | 67% |
| State Senator (State Senate District 19) | Roland Gutierrez (Democratic) | 830-278-1234 | 33% |
| State Representative (State House District 124) | Josey Garcia (Democratic) | 98% | |
| State Representative (State House District 117) | Philip Cortez (Democratic) | 210-923-3638 | 1.9% |
| State Representative (State House District 125) | Ray Lopez (Democratic) | 210-684-5419 | <0.1% |
| 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 ZIP residents |
|---|---|
| State Senate District 26 | 67% |
| State Senate District 19 | 33% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 124 | 98% |
| State House District 117 | 1.9% |
| State House District 125 | land only |
Voting precincts
20 voting precincts overlap ZIP 78251. 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:78251")
ZIP 78251 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.