Residential delivery area · Texas
ZIP Code 78566: Los Fresnos, TX
ZIP code 78566 uses the postal name Los Fresnos, Texas and lies entirely in Cameron County (Census 2020 ZIP-county file). About 25,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $60,187 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Brownsville (12%), Laureles (4%), Los Fresnos (3%), Bayview (3%), Del Mar Heights (under 1%), Indian Lake (under 1%), Orason (under 1%) and Chula Vista (under 1%); 78% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Los Fresnos · its only residential ZIP
- County
- Cameron County
- Census places
- Brownsville (12%); Laureles (4%) census-designated place; Los Fresnos (3%); Bayview (3%)
- Metro area
- Brownsville-Harlingen, TX
- House district
- TX-34 119th Congress
- State
- Texas
- Time zone
- Central
- Land area
- 139.0 sq mi · 181 people per sq mi
Where is ZIP code 78566?
78566 centers on 26.137°, -97.389° and covers 139.0 square miles of land plus 48.6 of water. It borders 5 ZIP codes: 78578, 78526, 78583, 78575, 78586.
The map draws ZIP code areas only. For the streets inside 78566, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 78566 compare with the rest of Cameron County?
| Measure | 78566 | In Cameron County | In TX |
|---|---|---|---|
| People (ACS 2020-2024) | 25,110 | 7th of 17 | 485th of 1,990 |
| Median household income | $60k | 4th of 10 | 843rd of 1,172 |
| Median home value | $154k | 7th of 12 | 955th of 1,172 |
Its median household income is higher than in 29% of U.S. residential ZIP codes, and it is denser than 61% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 78566?
The 2020 Census counted 23,704 people in 78566; the ACS, which samples households over 2020-2024, estimates 25,110. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 25,110
- 2020 Census count
- 23,704
- Households
- 7,241
- Median age
- 33.0
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 78566?
Of the 25,110 people the ACS estimates in 78566, 32.9% are under 18 and 10.7% are 65 or older. The largest group by race and Hispanic origin is Hispanic or Latino (90.3%).
- Under 1832.9%
- 18 to 6456.4%
- 65 and older10.7%
- Hispanic or Latino90.3%
- White, not Hispanic8.7%
- Asian, not Hispanic0.6%
- Other or two or more0.3%
- Black, not Hispanic0.1%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 78566 earn?
Median household income is $60,187 (ACS 2020-2024), the 4th highest of the 10 ranked ZIP codes in Cameron County.
- Median household income
- $60,187±$8,841
- Income per person
- $24,638
- Below the poverty line
- 29.9%
- Unemployed (of the labor force)
- 4.9%
- Adults 25+ with a bachelor's degree
- 21.4%
- Adjusted gross income per tax return, 2022
- $48,51610,020 returns; wages 83% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 78566?
FHFA's house price index for 78566, built from repeat sales and appraisals of the same homes, rose 68% from 2015 to 2025 and rose 47% from 2020 to 2025, and moved +1.5% in 2025.
- Median home value (owners' estimate)
- $154,300
- Median gross rent
- $891
- Homes owned by their occupants
- 75.0%
- Housing units
- 8,244
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 78566?
170 business establishments had a location in this ZIP code in 2023, 36 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance27
- Accommodation and food services26
- Retail trade23
- Construction19
- Other services (except public administration)17
- Finance and insurance14
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 78566?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 78578 | Port Isabel | 10,016 | $52k | 8.2 mi |
| 78526 | Brownsville | 60,012 | $71k | 10.5 mi |
| 78583 | Rio Hondo | 5,236 | $52k | 11.5 mi |
| 78575 | Olmito | 4,575 | $72k | 12.3 mi |
| 78586 | San Benito | 50,964 | $46k | 16.0 mi |
| 78597 | South Padre Island | 2,935 | $68k | 11.7 mi (near) |
| 78521 | Brownsville | 87,380 | $45k | 14.1 mi (near) |
| 78520 | Brownsville | 64,740 | $50k | 15.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.