ZIP code · Port Isabel · Texas · United States
ZIP code 78578 — Port Isabel
ZIP code 78578 serves Port Isabel, Texas.
- Postal code
- 78578Single source Value from one source, not cross-checked.
- City
- Port Isabel
- County
- Cameron FIPS 48061
- State
- Texas
- Country
- United States
- Coordinates
- 26.0539, -97.3125 — precision precise (locality)
View on OpenStreetMap - Population
- 10,231 (ZCTA, ACS 5-year)
- Population density
- 180 / sq mi
- Land area
- 57 sq mi (147.5 km²) (ZCTA, ACS 5-year)
- Median household income
- $52,041
- Per-capita income
- $33,292
- Median age
- 48.2
- Households
- 4,295
- Housing units
- 6,391
- Median home value
- $193,700
- Median gross rent
- $763 / month
- Congressional district
- TX-34 (119th Congress)
- USDA hardiness zone
- 10a (30 to 35 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Chicago (UTC−6 / UTC−5 DST)
- Area code
- 956Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 78578 with another ZIP · ZIPs within 25 miles · distance from 78578
Map of ZIP code 78578
Climate — monthly normals
Warmest month Aug (avg high 92°F), coldest Jan (avg low 52°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 69 | 72 | 76 | 81 | 86 | 90 | 91 | 92 | 89 | 85 | 78 | 71 |
| Avg low °F | 52 | 56 | 61 | 67 | 73 | 76 | 77 | 77 | 74 | 69 | 61 | 54 |
| Precip in | 1.4 | 1.2 | 1.7 | 1.6 | 2.4 | 3.1 | 2.3 | 1.9 | 6.2 | 3.9 | 1.8 | 1.4 |
NOAA 1991–2020 climate normals from the nearest station: PORT ISABEL (2.8 mi) · NOAA NCEI
Places in ZIP 78578
- 5 schools
- 3 supermarkets
- 23 restaurants & cafés
- 3 bars & pubs
- 10 parks
- 10 playgrounds
- 2 gyms & sports centres
- 3 libraries
- 1 post offices
- 4 places of worship
- 1 banks
- 4 gas stations
- 1 EV charging stations
- 6 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page