PlainZIP

Port Isabel, TX

Single-footprint Census roll-up for Port Isabel, TX: 1 USPS ZIP, population 12,516. Open the primary ZIP for household income, housing tenure, and commute from ACS 2023 5-Year Estimates.

U.S. Census Bureau, SimpleMaps US ZIP Code Database, delivery-area ZIP coverage

ACS city ledger plate

Sheet PORT-ISABEL-TX · Port Isabel, TX 1 ZIPs · 12,516 pop · #21127/25278 · Cameron County

INC-MID · RANK-BOTTOM · PHOTO-FINISH · BOOK-ONE · OWN-MID · POP-TOWN · SPREAD-UNK · HOME-LOW

  • INC-MID $51,880
  • RANK-BOTTOM #21127/25278
  • PHOTO-FINISH ≈ Rio Hondo
  • BOOK-ONE 1 ZIP
  • OWN-MID 75% owners
  • POP-TOWN 12,516
  • SPREAD-UNK Single-ZIP book
  • HOME-LOW $196,200

Nearest income peer: Rio Hondo, TX ( $427 income $)

Instrument codes from this city’s ACS household income, national rank, county-peer gap, ZIP book, owner tenure, population scale, intra-city income spread, and home-value band, not a moving recommendation.

Income neighbourhood around Port Isabel

Lowest/highest poles plus county-sharing cities nearest Port Isabel on average ZIP median household income. Full ladder: /cities.

median HH income

What this shows County-sharing peers only, not the full US city board. Open a near peer when the gap is small; open the poles when the mosaic is wide.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2026-08-25

National city placement

According to ACS 5-Year Estimates, Port Isabel, TX sits among US cities with one of the lowest household incomes among US cities, on a town-scale population base, across a single-ZIP footprint.

16th pct
household income vs 25,278 US cities
12,516
city population (Census)
1
USPS ZIP codes covered
$51,880
avg ZIP median income

Income percentile ranks this city's average ZIP median household income against 25,278 US cities with ACS income on at least one ZIP. Scale and ZIP-spread words come from Census population and USPS ZIP coverage.

Lower-income footing on only 1 ZIP ($51,880 average) · poverty 27.0%. The primary code (78578) carries the ACS household fields that matter.

Owner-occupancy sits in a mixed band (74.6%) - check the ZIP page's tenure split before treating Port Isabel as a pure owner town.

Within Texas, Wallis is the closest lower-income city and Buffalo the closest higher-income city by average ZIP household income. Their 1 and 1 ZIP footprints are the immediate statewide comparison set for Port Isabel.

Population concentration

Port Isabel's single ZIP 78578 carries the town

Port Isabel is published as a single USPS ZIP. Code 78578 is the entire residential footprint (12,516 ACS residents), so the city page and the ZIP page tell the same household story, open that ZIP for income, tenure, and commute detail.

Census ZBP business roll-up

Mid-pack ZBP load on Port Isabel's one ZIP

Citywide ZBP: 211 establishments, 1,997 employees , annual payroll $64,089k (~17 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 78578 (211 units) ; leading NAICS Accommodation and food services (40) · also Retail trade · Agriculture, forestry, fishing and hunting .

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ZIP Codes in Port Isabel, TX

These ZIP codes sit in Cameron County, which covers 16 ZIP codes in all; 1 of them fall in Port Isabel. See the Cameron County roll-up →

Port Isabel lands mid-pack among the 10 cities sharing Cameron County: Brownsville, Harlingen and Los Fresnos earn more and San Benito, La Feria and Santa Rosa earn less. Olmito marks the far end of that range at $71,765, 38% above Port Isabel.

ZIP Code Population Median income Establishments Density
78578 12,516 $51,880 211 81
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Port Isabel roll-ups here are for informational purposes only and do not constitute financial or relocation advice. ACS and Census ZBP figures are estimates; confirm the current table against Census before a money or move decision involving Port Isabel, .