78551 ZIP Code — Harlingen, TX
Cameron County, Texas
ZIP code 78551 is located in Harlingen, Texas, within Cameron County. It covers approximately 0.00 square miles and serves a population of 0 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 956.
0
population
0.00
sq mi land
Standard
ZIP type
Central (CT)
timezone
78551 ZIP code map
Cities in ZIP code 78551
Below are the cities the US Postal Service accepts for ZIP code 78551. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Harlingen | Acceptable |
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 0 |
| Population density | 0 / sq mi |
| State FIPS | 48 |
| County FIPS | 061 |
| Geography | |
|---|---|
| Land area | 0.00 sq mi |
| Water area | 0.00 sq mi |
| Latitude | 26.1906 |
| Longitude | -97.6956 |
| Timezone | Central (CT) |
| Area code | 956 |