Boundary Atlas

ZIP code 78655: Martindale, TX

ZIP code 78655 is in Martindale (43% of residents) and Staples (3.4%), in Caldwell County (74%) and Guadalupe County (26%), Texas. 54% of its residents live outside city limits. It is in Texas's 27th congressional district (74%) and Texas's 35th congressional district (26%). Its state senate district is State Senate District 21; its state house districts are State House District 17 (74%) and State House District 44 (26%).

2,910residents (2020 Census)
28.7 sq miland area
2cities and towns
2congressional districts
4voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Martindale43%
Staples3.4%

CountyShare of ZIP residents
Caldwell County74%
Guadalupe County26%

Town or county subdivisionShare of ZIP residents
Martindale CCD74%
Northeast Guadalupe CCD26%

Congressional districts

Congressional districtShare of ZIP residents
Texas's 27th congressional district (TX-27)74%
Texas's 35th congressional district (TX-35)26%

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.

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (TX-27)Michael Cloud (R)202-225-774274%
U.S. Representative (TX-35)Greg Casar (D)202-225-564526%
U.S. SenatorJohn Cornyn (R)202-224-2934 · contact formstatewide
U.S. SenatorTed Cruz (R)202-224-5922 · contact formstatewide
State Senator (State Senate District 21)Judith Zaffirini (Democratic)956-722-2293100%
State Representative (State House District 17)Stan Gerdes (R)512-321-372074%
State Representative (State House District 44)Alan Schoolcraft (R)26%

Elected in 2024 under TX's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).

Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).

Local government

State legislative districts

State senate districtShare of ZIP residents
State Senate District 21100%

State house districtShare of ZIP residents
State House District 1774%
State House District 4426%

Voting precincts

4 voting precincts overlap ZIP 78655. 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:78655")

ZIP 78655 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.