78566 ZIP Code — Los Fresnos, TX

Cameron County, Texas

ZIP code 78566 is located in Los Fresnos, Texas, within Cameron County. It covers approximately 138.98 square miles and serves a population of 24,232 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 956.

About ZIP code 78566

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $124,000. Owner-occupancy sits near the national average at 75%.

Median household income is $55,121. Poverty affects 27% of residents, above the national average. SNAP benefit usage at 18% of households reflects economic stress in the area.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 24 minutes is near the national average.

College attainment at 19% is below the national average, consistent with a trades and production-oriented local economy.

32% of residents lack health insurance, above the national average.

Notable community characteristics include Spanish spoken in 27% of households.

Overall, ZIP code 78566 reflects a community defined by a trades-oriented workforce, economic challenges above the national average, and elevated reliance on food assistance.

24,232

population

138.98

sq mi land

Standard

ZIP type

Central (CT)

timezone

78566 ZIP code map

Cities in ZIP code 78566

Below are the cities the US Postal Service accepts for ZIP code 78566. Using any city not on this list may result in mail delivery delays.

City	Status
Los Fresnos	Acceptable
Los Fresnos	Preferred

Nearby ZIP codes

78526 Brownsville (9.3 mi) 78578 Port Isabel (10 mi) 78583 Rio Hondo (10.9 mi) 78575 Olmito (10.9 mi) 78520 Brownsville (13.7 mi) 78586 San Benito (14.3 mi) 78521 Brownsville (15.1 mi) 78550 Harlingen (18.7 mi)

Demographics updated 06/2026

Population
Total population	24,232
Population density	174 / sq mi
State FIPS	48
County FIPS	061

Geography
Land area	138.98 sq mi
Water area	48.61 sq mi
Latitude	26.1231
Longitude	-97.4106
Timezone	Central (CT)
Area code	956

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	49.1%	57.0%	39.5%
$50k – $100k	27.1%	28.1%	30.1%
$100k – $200k	18.8%	12.6%	22.6%
Over $200k	5.1%	2.3%	7.8%

Demographics & statistics

24,232

Population

174

People per sq mi

32.4

Median age

$55,121

Median household income

$23,652

Per capita income

$124,000

Median home value

$846

Median monthly rent

74.8%

Home ownership

27.2%

Poverty rate

6.5%

Unemployment

6,337

Housing units

19.3%

Bachelor's or higher

Age distribution

Male Female

855

Under 5

778

981

5–9

893

1,458

10–14

1,326

1,394

15–19

1,268

926

20–24

843

1,058

25–34

962

1,876

35–44

1,707

1,657

45–54

1,507

689

55–59

627

495

60–64

450

623

65–74

566

363

75–84

331

314

85+

285

← Male

Female →

Age summary

Group	Count	%
Under 18	7,913	32.7%
18 and over	16,319	67.3%
65 and over	2,482	10.2%
Median age	32.4 years

Race & ethnicity

White 44.2%

Hispanic or Latino 27.2%

Two or more races 22.8%

Other race 4.6%

Black or African American 0.7%

American Indian / Alaska Native 0.3%

Asian 0.1%

Group	Count	%
White	14,734	44.2%
Hispanic or Latino	9,072	27.2%
Two or more races	7,578	22.8%
Other race	1,545	4.6%
Black or African American	236	0.7%
American Indian / Alaska Native	104	0.3%
Asian	35	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	49.1%	57.0%	39.5%
$50k – $100k	27.1%	28.1%	30.1%
$100k – $200k	18.8%	12.6%	22.6%
Over $200k	5.1%	2.3%	7.8%

Under $10k 10.1%

$10k–$15k 4.5%

$15k–$25k 10.9%

$25k–$35k 12.5%

$35k–$50k 9.6%

$50k–$75k 13.9%

$75k–$100k 12.9%

$100k–$150k 12.8%

$150k–$200k 8.2%

$200k+ 4.6%

Range	% of households
Under $10k	10.1%
$10k–$15k	4.5%
$15k–$25k	10.9%
$25k–$35k	12.5%
$35k–$50k	9.6%
$50k–$75k	13.9%
$75k–$100k	12.9%
$100k–$150k	12.8%
$150k–$200k	8.2%
$200k+	4.6%
Median income	$55,121

Housing

Home values

Under $50k 9.9%

$50k–$100k 24.0%

$100k–$150k 26.4%

$150k–$200k 12.0%

$200k–$300k 13.3%

$300k–$500k 10.6%

$500k–$1M 2.5%

$1M+ 1.4%

Housing overview

Metric	Value
Median home value	$124,000
Median rent / month	$846
Owner occupied	74.8%
Renter occupied	25.2%
Vacant	13.2%
Single-family detached	76.0%
Large apartment buildings	4.3%
Mobile homes	12.5%
Median rooms	5.4
Avg household size (owned)	3.52

Year built

Era	%
2020 or later	0.6%
2010–2019	17.5%
2000–2009	33.3%
1990–1999	13.9%
1980–1989	13.8%
1970–1979	13.2%
1960–1969	3.7%
1950–1959	2.4%
1940–1949	0.0%
1939 or earlier	1.4%

Bedrooms

Size	% of units
No bedroom (studio)	1.4%
1 bedroom	2.6%
2 bedrooms	22.4%
3 bedrooms	51.2%
4 bedrooms	20.5%
5+ bedrooms	1.8%

Vehicles per household

Vehicles	% of households
No vehicle	5.2%
1 vehicle	29.8%
2 vehicles	36.3%
3 or more	28.7%

Heating fuel

Fuel type	%
Utility gas	3.1%
Electricity	93.0%
Propane / LP gas	2.1%
Fuel oil	0.4%
Solar	0.1%
No fuel used	1.3%

Households & families

Household type	Count	%
Married-couple family	3,662	52.1%
Cohabiting couple	265	3.8%
Male householder, no spouse	1,341	19.1%
Female householder, no spouse	1,767	25.1%
Households with children under 18	3,540	50.3%
Households with seniors (65+)	1,780	25.3%
Average household size	3.43

Marital status

Status	Male	Female
Never married	37.8%	32.1%
Married	49.7%	46.2%
Separated	0.7%	3.4%
Widowed	2.8%	9.6%
Divorced	9.0%	8.7%

Education

Less than 9th grade 15.3%

Some HS, no diploma 13.1%

HS graduate 25.8%

Some college, no degree 17.6%

Associate's degree 8.9%

Bachelor's degree 13.7%

Graduate / professional 5.6%

Metric	%
HS diploma or higher	71.6%
Bachelor's or higher	19.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	290	3.7%
Kindergarten	414	5.3%
Elementary school	3,205	41.1%
High school	2,466	31.6%
College / grad school	1,417	18.2%

Employment

Industry of employment

Education & healthcare 29.7%

Construction 12.3%

Public administration 9.9%

Arts, food & hospitality 8.3%

Retail trade 7.8%

Manufacturing 7.6%

Transportation & utilities 7.0%

Professional & management 6.0%

Finance & real estate 4.1%

Agriculture & mining 3.7%

Other services 1.7%

Wholesale trade 1.0%

Information 1.0%

Occupation

Category	%
Management, business & arts	30.1%
Service	22.0%
Sales & office	20.5%
Natural resources & construction	15.3%
Production & transportation	12.1%

Employment type

Type	%
Private sector	69.0%
Government	25.5%
Self-employed	5.4%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	83.1%
Carpool	11.0%
Public transit	0.0%
Walk	0.4%
Work from home	4.8%
Other means	0.6%
Avg commute (minutes)	24.1

Poverty

All people 27.2%

Under 18 years 37.1%

18 and over 22.4%

Married-couple families 13.1%

Female-led households 54.1%

Income support

Source	% of households
Social Security	23.2%
Retirement income	14.4%
Supplemental Security	5.0%
Cash public assistance	2.1%
Food stamps / SNAP	17.6%

Health indicators

Condition	%
Obesity	41.0%
High blood pressure	30.1%
High cholesterol	31.7%
Diabetes	14.3%
Heart disease	5.6%
Stroke	2.9%
Asthma	8.4%
Arthritis	16.3%
Kidney disease	3.2%
Pulmonary disease	5.5%
Cancer	3.8%

Behavior / access	%
Smoking	17.6%
Binge drinking	18.3%
No physical activity	30.4%
Less than 7 hrs sleep	32.6%
Depression	20.0%
Fair or poor health	25.2%
Poor mental health	16.2%
Poor physical health	13.8%
No health insurance	46.8%
Visited doctor (checkup)	68.2%
Visited dentist	48.3%
Cholesterol screening	85.1%
Teeth loss	16.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	584	3.6%

Disability	%
Any disability	9.7%
Under 18	5.2%
18–64 years	7.8%
65 and over	35.2%

Health insurance coverage

Type	%
Private insurance	39.2%
Public insurance	33.4%
No insurance	32.1%
Uninsured under 19	24.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	22,599	93.3%
Spanish	6,059	26.8%
Other Indo-European	6,039	26.7%
Asian & Pacific Islander	10	0.0%
Other languages	9	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	18,971	78.3%
Born in same state	18,776	77.5%
Born in different state	16,221	66.9%
Foreign born	195	0.8%
Naturalized citizen	5,261	21.7%
Not a US citizen	1,745	33.2%

Ancestry

Ancestry	Count	%
French	489	2%
Italian	440	1.8%
Arab	346	1.4%
Norwegian	42	0.2%

Ancestry	Count	%
German	35	0.1%
English	35	0.1%
Polish	8	0%

Technology access

Metric	% of households
Computer access	29.0%
Internet access	95.5%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 78566

What city is ZIP code 78566 in?

ZIP code 78566 is primarily assigned to Los Fresnos, Texas.

What county is ZIP code 78566 in?

ZIP code 78566 falls within Cameron County, Texas.

Is ZIP code 78566 family-oriented?

33% of residents in ZIP code 78566 are under 18, reflecting a younger, family-oriented community.

What is the poverty rate in ZIP code 78566?

27% of residents in ZIP code 78566 live below the poverty line, above the national average.

Is Spanish widely spoken in ZIP code 78566?

Approximately 27% of households in ZIP code 78566 speak Spanish as a primary language.

What is the typical home value in ZIP code 78566?

The median home value in ZIP code 78566 is $124,000.

What timezone is ZIP code 78566 in?

ZIP code 78566 observes the CST timezone.