Boundary Atlas

ZIP code 78255: San Antonio, TX

ZIP code 78255 is in San Antonio (31% of residents), Scenic Oaks (29%) and Cross Mountain (17%), in Bexar County, Texas. 24% of its residents live outside city limits. It is in Texas's 23rd congressional district. Its state senate districts are State Senate District 25 (67%) and State Senate District 19 (33%); its state house district is State House District 122.

17,775residents (2020 Census)
17.9 sq miland area
3cities and towns
1congressional district
14voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
San Antonio31%
Scenic Oaks29%
Cross Mountain17%

CountyShare of ZIP residents
Bexar County100%

Town or county subdivisionShare of ZIP residents
San Antonio Northwest CCD100%

Congressional district

Congressional districtShare of ZIP residents
Texas's 23rd congressional district (TX-23)100%

Elected officials

OfficeMemberContactShare of residents
MayorGina Ortiz Jones31%
U.S. SenatorJohn Cornyn (R)202-224-2934 · contact formstatewide
U.S. SenatorTed Cruz (R)202-224-5922 · contact formstatewide
State Senator (State Senate District 25)Donna Campbell (R)830-626-006567%
State Senator (State Senate District 19)Roland Gutierrez (Democratic)830-278-123433%
State Representative (State House District 122)Mark Dorazio (R)100%
U.S. Representative (TX-23)Vacant

From Wikidata (community-maintained); confirm on the city's website.

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 2567%
State Senate District 1933%

State house districtShare of ZIP residents
State House District 122100%

Voting precincts

14 voting precincts overlap ZIP 78255. Map them, with each precinct's share of the ZIP's residents.

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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:

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ZIP 78255 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.