Boundary Atlas

ZIP code 78112: Sandy Oaks, TX

ZIP code 78112 is in Sandy Oaks (53% of residents), Elmendorf (19%) and San Antonio (3.1%), in Bexar County (99%) and Wilson County (0.7%), Texas. 25% of its residents live outside city limits. It is in Texas's 35th congressional district. Its state senate districts are State Senate District 21 (95%) and State Senate District 19 (5.1%); its state house districts are State House District 118 (99%) and State House District 31 (0.7%).

9,591residents (2020 Census)
51.4 sq miland area
3cities and towns
1congressional district
9voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Sandy Oaks53%
Elmendorf19%
San Antonio3.1%

CountyShare of ZIP residents
Bexar County99%
Wilson County0.7%

Town or county subdivisionShare of ZIP residents
San Antonio South CCD62%
San Antonio East CCD37%
Floresville CCD0.7%

Congressional district

Congressional districtShare of ZIP residents
Texas's 35th congressional district (TX-35)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 2195%
State Senate District 195.1%

State house districtShare of ZIP residents
State House District 11899%
State House District 310.7%

Voting precincts

9 voting precincts overlap ZIP 78112. 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:

related_geographies(id="us:zcta:78112")

ZIP 78112 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.