78384 ZIP Code — San Diego, TX

Duval County, Texas

ZIP code 78384 is located in San Diego, Texas, within Duval County. It covers approximately 591.38 square miles and serves a population of 5,510 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 361.

About ZIP code 78384

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $61,100. Owner-occupancy is high at 77%, well above the national average.

Median household income is $44,324. Poverty affects 23% of residents, above the national average. SNAP benefit usage at 34% of households reflects economic stress in the area. 42% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 35 minutes is near the national average.

College attainment at 7% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of diabetes (19%) compared to national benchmarks. 19% of residents lack health insurance, above the national average.

Overall, ZIP code 78384 reflects a community defined by a trades-oriented workforce, economic challenges above the national average, high homeownership, a significant Social Security-dependent population, and elevated reliance on food assistance.

5,510
population
591.38
sq mi land
Standard
ZIP type
Central (CT)
timezone
78384 ZIP code map
Cities in ZIP code 78384

Below are the cities the US Postal Service accepts for ZIP code 78384. Using any city not on this list may result in mail delivery delays.

City Status
San Diego Acceptable
San Diego Preferred
Nearby ZIP codes
78357 Freer (15.4 mi)
Demographics updated 06/2026
Population
Total population 5,510
Population density 9 / sq mi
State FIPS 48
County FIPS 131
Geography
Land area 591.38 sq mi
Water area 1.45 sq mi
Latitude 27.8568
Longitude -98.3636
Timezone Central (CT)
Area code 361
Total population by age
Gender
Race & ethnicity
Economics updated 06/2026
Household income
Income range This ZIP County avg State avg
Under $50k 64.8% 54.4% 39.5%
$50k – $100k 26.6% 31.5% 30.1%
$100k – $200k 8.6% 13.5% 22.6%
Over $200k 0.0% 0.6% 7.8%

Demographics & statistics

5,510
Population
9
People per sq mi
36.0
Median age
$44,324
Median household income
$18,687
Per capita income
$61,100
Median home value
$0
Median monthly rent
76.9%
Home ownership
22.6%
Poverty rate
10.7%
Unemployment
1,962
Housing units
6.5%
Bachelor's or higher

Age distribution

Male Female
183
Under 5
159
203
5–9
177
284
10–14
247
262
15–19
228
120
20–24
104
317
25–34
275
607
35–44
526
264
45–54
229
193
55–59
167
107
60–64
92
247
65–74
214
115
75–84
100
48
85+
42
← Male
Female →

Age summary

GroupCount%
Under 181,47426.8%
18 and over4,03673.2%
65 and over76613.9%
Median age36.0 years

Race & ethnicity

White 71.7%
Two or more races 12.9%
Hispanic or Latino 12.7%
Black or African American 1.5%
Other race 0.6%
American Indian / Alaska Native 0.5%
GroupCount%
White4,52771.7%
Two or more races81612.9%
Hispanic or Latino80112.7%
Black or African American921.5%
Other race410.6%
American Indian / Alaska Native340.5%

Household income

Income range This ZIP County avg State avg
Under $50k 64.8% 54.4% 39.5%
$50k – $100k 26.6% 31.5% 30.1%
$100k – $200k 8.6% 13.5% 22.6%
Over $200k 0.0% 0.6% 7.8%
Under $10k 7.2%
$10k–$15k 8.4%
$15k–$25k 10.6%
$25k–$35k 16.2%
$35k–$50k 12.0%
$50k–$75k 16.7%
$75k–$100k 16.0%
$100k–$150k 7.4%
$150k–$200k 3.1%
$200k+ 2.3%
Range% of households
Under $10k7.2%
$10k–$15k8.4%
$15k–$25k10.6%
$25k–$35k16.2%
$35k–$50k12.0%
$50k–$75k16.7%
$75k–$100k16.0%
$100k–$150k7.4%
$150k–$200k3.1%
$200k+2.3%
Median income$44,324

Housing

Home values

Under $50k 38.5%
$50k–$100k 25.7%
$100k–$150k 17.9%
$150k–$200k 8.4%
$200k–$300k 8.0%
$500k–$1M 1.4%

Housing overview

MetricValue
Median home value$61,100
Median rent / month$0
Owner occupied76.9%
Renter occupied23.1%
Vacant31.8%
Single-family detached82.6%
Large apartment buildings0.0%
Mobile homes9.7%
Median rooms5.4
Avg household size (owned)2.84

Year built

Era%
2020 or later0.0%
2010–20190.8%
2000–200914.6%
1990–19999.8%
1980–198917.6%
1970–197918.3%
1960–196910.0%
1950–195917.2%
1940–19497.1%
1939 or earlier4.6%

Bedrooms

Size% of units
No bedroom (studio)4.6%
1 bedroom10.0%
2 bedrooms25.5%
3 bedrooms41.9%
4 bedrooms15.4%
5+ bedrooms2.6%

Vehicles per household

Vehicles% of households
No vehicle12.0%
1 vehicle32.2%
2 vehicles35.3%
3 or more20.5%

Heating fuel

Fuel type%
Utility gas24.4%
Electricity70.4%
Propane / LP gas2.3%
Solar0.6%
No fuel used2.3%

Households & families

Household typeCount%
Married-couple family45028.3%
Cohabiting couple1338.4%
Male householder, no spouse35222.2%
Female householder, no spouse65441.2%
Households with children under 1852132.8%
Households with seniors (65+)59537.4%
Average household size3.10

Marital status

StatusMaleFemale
Never married51.9%42.8%
Married33.1%25.0%
Separated3.0%1.7%
Widowed4.5%11.8%
Divorced7.4%18.8%

Education

Less than 9th grade 14.8%
Some HS, no diploma 12.0%
HS graduate 29.9%
Some college, no degree 27.6%
Associate's degree 9.3%
Bachelor's degree 5.6%
Graduate / professional 0.9%
Metric%
HS diploma or higher73.2%
Bachelor's or higher6.5%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool16910.4%
Kindergarten895.5%
Elementary school77547.7%
High school46528.6%
College / grad school1267.8%

Employment

Industry of employment

Education & healthcare 28.6%
Agriculture & mining 19.0%
Retail trade 10.7%
Other services 10.7%
Manufacturing 7.1%
Public administration 5.7%
Construction 5.5%
Arts, food & hospitality 4.7%
Professional & management 4.2%
Finance & real estate 2.9%
Transportation & utilities 1.0%

Occupation

Category%
Management, business & arts27.3%
Service20.1%
Sales & office23.0%
Natural resources & construction22.1%
Production & transportation7.5%

Employment type

Type%
Private sector85.1%
Government14.9%
Self-employed0.0%
Unpaid family workers0.0%

Commute

Method%
Drive alone61.4%
Carpool22.0%
Public transit0.0%
Walk1.2%
Work from home10.5%
Other means5.0%
Avg commute (minutes)34.6

Poverty

All people 22.6%
Under 18 years 26.0%
18 and over 21.2%
Married-couple families 8.9%
Female-led households 17.1%

Income support

Source% of households
Social Security41.9%
Retirement income7.6%
Supplemental Security9.8%
Cash public assistance3.8%
Food stamps / SNAP34.3%

Health indicators

Condition%
Obesity42.7%
High blood pressure36.2%
High cholesterol34.7%
Diabetes18.6%
Heart disease7.7%
Stroke3.7%
Asthma9.0%
Arthritis22.5%
Kidney disease4.1%
Pulmonary disease6.6%
Cancer4.6%
Behavior / access%
Smoking19.1%
Binge drinking16.1%
No physical activity40.0%
Less than 7 hrs sleep35.8%
Depression20.0%
Fair or poor health30.1%
Poor mental health16.3%
Poor physical health15.5%
No health insurance49.5%
Visited doctor (checkup)69.3%
Visited dentist39.1%
Cholesterol screening84.7%
Teeth loss19.5%

Veterans & disability

VeteransCount%
Civilian veterans1363.4%
Disability%
Any disability20.5%
Under 1815.1%
18–64 years19.0%
65 and over38.4%

Health insurance coverage

Type%
Private insurance38.7%
Public insurance50.3%
No insurance19.1%
Uninsured under 193.7%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only5,16893.8%
Spanish4268.2%
Other Indo-European4268.2%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)5,42598.5%
Born in same state5,41498.3%
Born in different state5,15593.6%
Foreign born110.2%
Naturalized citizen851.5%
Not a US citizen5868.2%

Ancestry

AncestryCount%
Arab1352.5%
French651.2%
English601.1%
AncestryCount%
Polish220.4%
Italian120.2%

Technology access

Metric% of households
Computer access28.8%
Internet access69.7%

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

Frequently asked questions about ZIP code 78384

What city is ZIP code 78384 in?

ZIP code 78384 is primarily assigned to San Diego, Texas.

What county is ZIP code 78384 in?

ZIP code 78384 falls within Duval County, Texas.

How educated is the population of ZIP code 78384?

7% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

What is the poverty rate in ZIP code 78384?

23% of residents in ZIP code 78384 live below the poverty line, above the national average.

Does ZIP code 78384 have a large retiree population?

42% of households in ZIP code 78384 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 78384?

The median home value in ZIP code 78384 is $61,100.

What timezone is ZIP code 78384 in?

ZIP code 78384 observes the CST timezone.

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