Boundary Atlas

ZIP code 78073: Bexar County, TX

ZIP code 78073 is in Von Ormy (12% of residents) and San Antonio (10%), in Bexar County (84%) and Atascosa County (16%), Texas. 78% of its residents live outside city limits. It is in Texas's 35th congressional district (84%) and Texas's 28th congressional district (16%). Its state senate districts are State Senate District 19 (99%) and State Senate District 24 (0.7%); its state house districts are State House District 118 (84%) and State House District 80 (16%).

9,550residents (2020 Census)
53.4 sq miland area
3cities and towns
2congressional districts
10voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Von Ormy12%
San Antonio10%
Somerset0.3%

CountyShare of ZIP residents
Bexar County84%
Atascosa County16%

Town or county subdivisionShare of ZIP residents
San Antonio South CCD84%
Poteet CCD16%

Congressional districts

Congressional districtShare of ZIP residents
Texas's 35th congressional district (TX-35)84%
Texas's 28th congressional district (TX-28)16%

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.

State legislative districts

State senate districtShare of ZIP residents
State Senate District 1999%
State Senate District 240.7%

State house districtShare of ZIP residents
State House District 11884%
State House District 8016%
State House District 117land only

Voting precincts

10 voting precincts overlap ZIP 78073. 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:78073")

ZIP 78073 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.