78578
Port Isabel, Texas.
Port Isabel, Cameron County, TX · Brownsville-Harlingen, TX metro · population 10,016
to buy the typical home at today's mortgage rate — +$812 (+142%) since Jan 2020.
- 1 year
- Up $6,644 +3%
- $256,589$263,233 since Sep 2025
- 5 years
- Up $61,717 +31%
- $201,516$263,233 since Sep 2021
Monthly payment to buy the typical home
Home value × that month's 30-year mortgage rate, 20% down, principal and interest. This is the line households feel: prices and rates compound each other.
- 78578$1,382
- United States$1,922
At the last five years' pace, a typical home here doubles in price every 13 years.
Typical home values in zip 78578 rose 2.6% over the past year — faster than the nation's +1.2%.
Zillow also publishes an index for the city itself: Port Isabel, TX — measured over the city limits, which is a different area from this zip.
Asking rent — 78578
Against the Brownsville-Harlingen, TX metro and the national benchmark.
- 78578$1,993
- Brownsville$1,509
- United States$1,932
Typical home value — 78578
Mid-tier homes, smoothed and seasonally adjusted.
- 78578$263,233
- Brownsville$204,552
- United States$366,157
Within 20 miles
| Miles sorted ascending, activate to sort descending | Zip activate to sort by Zip | City activate to sort by City | Population activate to sort by Population | Rent activate to sort by Rent | Home value activate to sort by Home value |
|---|---|---|---|---|---|
| 7.1 | 78521 | Brownsville | 87,380 | $1,609 | $169,028 |
| 9.0 | 78566 | Los Fresnos | 25,110 | — | $221,820 |
| 9.5 | 78526 | Brownsville | 60,012 | $1,897 | $235,340 |
| 15.0 | 78575 | Olmito | 4,575 | $1,656 | $289,682 |
| 15.1 | 78597 | South Padre Island | 2,935 | $2,758 | $443,417 |
| 16.1 | 78520 | Brownsville | 64,740 | $1,521 | $189,048 |
| 18.6 | 78583 | Rio Hondo | 5,236 | — | $203,664 |
Coordinates and population from SimpleMaps US Zips (Basic). Rent and home values from Zillow Research.