Boundary Atlas

ZIP code 78552: Harlingen, TX

ZIP code 78552 is in Harlingen (52% of residents), Primera (14%), Combes (5.0%), Palm Valley (3.7%), Las Palmas II (2.3%) and Juarez (1.7%), in Cameron County, Texas. 22% of its residents live outside city limits. It is in Texas's 34th congressional district. Its state senate district is State Senate District 27; its state house districts are State House District 37 (97%) and State House District 35 (2.6%).

38,474residents (2020 Census)
48.0 sq miland area
6cities and towns
1congressional district
15voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Harlingen52%
Primera14%
Combes5.0%
Palm Valley3.7%
Las Palmas II2.3%
Juarez1.7%

CountyShare of ZIP residents
Cameron County100%

Town or county subdivisionShare of ZIP residents
Harlingen-San Benito CCD100%

Congressional district

Congressional districtShare of ZIP residents
Texas's 34th congressional district (TX-34)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 27100%

State house districtShare of ZIP residents
State House District 3797%
State House District 352.6%

Voting precincts

15 voting precincts overlap ZIP 78552. 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:78552")

ZIP 78552 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.