ZIP code 78635: Blanco County, TX
ZIP code 78635 is in Blanco County, Texas, outside any city or Census-designated place. It is in Texas's 21st congressional district. Its state senate district is State Senate District 25; its state house district is State House District 19.
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Blanco County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Johnson City CCD | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Texas's 21st congressional district (TX-21) | 100% |
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 25 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 19 | 100% |
Voting precincts
1 voting precinct overlap ZIP 78635. 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:78635")
ZIP 78635 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.