78578 — Port Isabel, TX Home Values
Typical home value $266,479 as of June 2026 · 3rd of 13 in Brownsville-Harlingen, TX
Blue: typical home value (Zillow ZHVI) in ZIP code 78578, June 2021 to June 2026. This page shows observed data only; no forecast.
How 78578 compares in the Brownsville-Harlingen, TX area
ZIP code 78578 (Port Isabel, TX) has a typical home value of $266,479 as of June 2026, ranking 3rd of 13 ZIP codes tracked in the Brownsville-Harlingen, TX area, more expensive than about 85% of ZIP codes in the metro. Prices here have moved +2.5% over the trailing 12 months. Over the past five years, the typical value in this ZIP code has changed +43.1%, from $186,183 in June 2021 to $266,479 in June 2026. Against observed rent, the typical home here sells for 10.9× the annual rent ($2,038/mo), a common way to gauge whether buying looks cheap relative to renting in this ZIP code.
Every figure above is observed Zillow data. Sialim's forecasting engine works at the metro level; see the Brownsville-Harlingen, TX forecast for a modeled outlook, or browse the full ranked list of ZIP codes in Brownsville.
Population and demographics
ZIP code 78578 has a population of 10,231, per the Census Bureau's American Community Survey 5-year estimate. By race and ethnicity: 66.4% Hispanic or Latino, 31.9% White, 0.6% another race, 0.6% two or more races, 0.4% Asian, and 0.1% American Indian or Alaska Native.
Nearby public schools
| School | Address | Distance |
|---|---|---|
| PORT ISABEL EARLY COLLEGE H S | 18001 HWY 100, PORT ISABEL, TX | 4.4 mi |
| PORT ISABEL J H | 17001 HWY 100, PORT ISABEL, TX | 4.4 mi |
| DERRY EL | 1702 2ND ST, PORT ISABEL, TX | 5.5 mi |
Distance is straight-line from the ZIP code's center; driving distance will be longer. School attendance is set by district boundaries, not proximity. Confirm which school a specific address is zoned for with the local school district. Source: National Center for Education Statistics.
Frequently asked questions
What is the typical home value in ZIP code 78578?
$266,479 as of June 2026, the latest month Zillow has published observed data for.
Is 78578 an expensive ZIP code in the Brownsville-Harlingen, TX area?
78578 ranks 3rd of 13 ZIP codes in the Brownsville-Harlingen, TX area by typical home value, more expensive than about 85% of ZIP codes in the metro.
How much have home values in 78578 changed over the past year?
+2.5% over the trailing 12 months, from observed Zillow data.
Is it cheaper to buy or rent in ZIP code 78578?
The typical home price is 10.9× the observed annual rent in this ZIP code ($2,038/mo). Lower multiples favor buying over renting, all else equal.
What is the population of ZIP code 78578?
10,231, per the US Census Bureau's American Community Survey 5-year estimate.
What are the closest public schools to ZIP code 78578?
PORT ISABEL EARLY COLLEGE H S (4.4 mi), PORT ISABEL J H (4.4 mi), DERRY EL (5.5 mi), by straight-line distance from the ZIP code's center. School attendance is set by district boundaries, not proximity. Confirm assignment with the local school district.
Is this page showing a forecast for 78578?
No. Every number on this page is observed Zillow data as of June 2026, not a forecast. Sialim's forecasting engine runs at the metro level; see the Brownsville-Harlingen, TX forecast for a modeled outlook.
ZIP-level values shown here are observed Zillow data, not forecasts. Sialim's forecasting engine works at the metro level today; ZIP-level forecasts are planned for Sialim Pro. Data © Zillow, via Zillow Research.