Boundary Atlas

ZIP code 78596: Weslaco, TX

ZIP code 78596 is in Weslaco (71% of residents), Llano Grande (7.9%), Progreso (6.8%), Midway South (4.2%) and Villa Verde (1.9%), in Hidalgo County, Texas. 8.0% of its residents live outside city limits. It is in Texas's 15th congressional district. Its state senate district is State Senate District 27; its state house district is State House District 39.

37,329residents (2020 Census)
40.1 sq miland area
7cities and towns
1congressional district
18voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Weslaco71%
Llano Grande7.9%
Progreso6.8%
Midway South4.2%
Villa Verde1.9%
Progreso Lakes0.7%
Mercedes<0.1%

CountyShare of ZIP residents
Hidalgo County100%

Town or county subdivisionShare of ZIP residents
Southeast Hidalgo CCD100%

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 27100%

State house districtShare of ZIP residents
State House District 39100%

Voting precincts

18 voting precincts overlap ZIP 78596. 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:78596")

ZIP 78596 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.