ZIP code 78550: Harlingen, TX
ZIP code 78550 is in Harlingen (92% of residents), in Cameron County, Texas. 7.6% 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 district is State House District 37.
City and county
| City or town | Share of ZIP residents |
|---|---|
| Harlingen | 92% |
| Combes | 1.0% |
| Rio Hondo | 0.2% |
| Lasana | 0.2% |
| County | Share of ZIP residents |
|---|---|
| Cameron County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Harlingen-San Benito CCD | 100% |
| Rio Hondo CCD | 0.3% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Texas's 34th congressional district (TX-34) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| Mayor | Norma Sepulveda | 92% | |
| U.S. Representative (TX-34) | Vicente Gonzalez (D) | 202-225-2531 | 100% |
| U.S. Senator | John Cornyn (R) | 202-224-2934 · contact form | statewide |
| U.S. Senator | Ted Cruz (R) | 202-224-5922 · contact form | statewide |
| State Senator (State Senate District 27) | Adam Hinojosa (R) | 956-542-2211 | 100% |
| State Representative (State House District 37) | Janie Lopez (R) | 956-247-3610 | 100% |
From Wikidata (community-maintained); confirm on the city's website.
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); Mayors: Wikidata (CC0).
Local government
- Harlingen website: http://www.myharlingen.us/
- Harlingen laws: search for the Harlingen, Texas code of ordinances
- Cameron County website: https://www.cameroncountytx.gov/
- Cameron County laws: search for the Cameron County, Texas code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 27 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 37 | 100% |
Voting precincts
20 voting precincts overlap ZIP 78550. 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:78550")
ZIP 78550 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.