Boundary Atlas

ZIP code 78629: Gonzales, TX

ZIP code 78629 is in Gonzales (59% of residents), in Gonzales County (100%) and DeWitt County (0.4%), Texas. 41% of its residents live outside city limits. It is in Texas's 15th congressional district. Its state senate district is State Senate District 18; its state house districts are State House District 44 (100%) and State House District 30 (0.4%).

12,046residents (2020 Census)
421.6 sq miland area
1cities and towns
1congressional district
12voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Gonzales59%

CountyShare of ZIP residents
Gonzales County100%
DeWitt County0.4%

Town or county subdivisionShare of ZIP residents
Gonzales CCD74%
Harwood-Ottine CCD16%
Cost-Wrightsboro CCD8.9%
Nixon CCD1.0%
Westhoff-Arneckville CCD0.4%

Congressional district

Congressional districtShare of ZIP residents
Texas's 15th congressional district (TX-15)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 18100%

State house districtShare of ZIP residents
State House District 44100%
State House District 300.4%

Voting precincts

12 voting precincts overlap ZIP 78629. 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:78629")

ZIP 78629 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.