Boundary Atlas

ZIP code 78620: Dripping Springs, TX

ZIP code 78620 is in Dripping Springs (21% of residents), in Hays County (86%), Travis County (14%) and Blanco County (0.8%), Texas. 79% of its residents live outside city limits. It is in Texas's 21st congressional district (86%) and Texas's 10th congressional district (14%). Its state senate district is State Senate District 25; its state house districts are State House District 73 (86%), State House District 47 (13%) and State House District 19 (1.1%).

20,493residents (2020 Census)
175.6 sq miland area
1cities and towns
2congressional districts
14voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Dripping Springs21%

CountyShare of ZIP residents
Hays County86%
Travis County14%
Blanco County0.8%

Town or county subdivisionShare of ZIP residents
Dripping Springs-Wimberley CCD86%
Southwest Travis CCD14%
Johnson City CCD0.5%
Blanco CCD0.4%

Congressional districts

Congressional districtShare of ZIP residents
Texas's 21st congressional district (TX-21)86%
Texas's 10th congressional district (TX-10)14%

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 25100%

State house districtShare of ZIP residents
State House District 7386%
State House District 4713%
State House District 191.1%

Voting precincts

14 voting precincts overlap ZIP 78620. 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:78620")

ZIP 78620 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.