ZIP code 78578: Port Isabel, TX
78578 is a ZIP code in Port Isabel, Texas, mainly in Cameron County, part of the Brownsville-Harlingen, TX metro area. About 10,016 people live here.
- Population
- 10,016
- Median household income
- $51,880
- Typical home value
- $263,200+2.6% in 12 months
- Median rent
- $749gross, per month
- Median age
- 49
- Homeowners
- 74.6%of occupied homes
Shaded: ZIP code 78578's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 78578 details
| City | Port Isabel |
|---|---|
| State | Texas |
| County | Cameron County |
| Metro area | Brownsville-Harlingen, TX |
| Time zone | Central Time (UTC−6), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 57 sq mi, plus 22 sq mi of water |
| Population density | 176 people per sq mi |
| Bachelor's degree or higher | 28.6% of adults 25+ |
| Average commute | 17.3 minutes |
| Center coordinates | 26.04396, -97.30659 |
Median rent in 78578 by bedrooms
| Size | Median gross rent |
|---|---|
| 1 bedroom | $481/mo |
| 2 bedrooms | $818/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 78578
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 78521 | Brownsville, TX | 6.9 mi | 87,380 |
| 78566 | Los Fresnos, TX | 8.2 mi | 25,110 |
| 78526 | Brownsville, TX | 9.6 mi | 60,012 |
| 78523 | Brownsville, TX | 14.0 mi | — |
| 78575 | Olmito, TX | 15.1 mi | 4,575 |
| 78522 | Brownsville, TX | 15.4 mi | — |
| 78597 | South Padre Island, TX | 16.0 mi | 2,935 |
| 78520 | Brownsville, TX | 16.1 mi | 64,740 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 78578?
A typical home in ZIP code 78578 is worth about $263,200 (Zillow Home Value Index). The median household here earns $51,880 a year. See what buying here would cost per month, with Texas average taxes and insurance filled in.
Monthly payment for a $263,200 homeWhat can a $51,880 income afford?Rental property numbers
About ZIP code 78578
What city is ZIP code 78578?
ZIP code 78578 is in Port Isabel, TX, in Cameron County.
What county is ZIP code 78578 in?
78578 is mainly in Cameron County, Texas.
What is the population of ZIP code 78578?
About 10,016 people live in ZIP code 78578, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 78578 in?
78578 is in Central Time (UTC−6). It observes daylight saving time.