ZipCodesToGo
Texas ZIP Codes
Refugio County
Bayside, TX
78340
78340 ZIP Code — Bayside, TX
Refugio County, Texas
ZIP code 78340 is located in
Bayside ,
Texas ,
within Refugio County .
It covers approximately 20.69 square miles and serves a population of
396 residents.
This is a standard ZIP code in the Central (CT) timezone,
served by area code 361 .
About ZIP code 78340
The housing stock consists of predominantly single-family detached homes. Much of the housing stock is relatively new, reflecting recent development activity. Median home value is $156,700. Owner-occupancy is high at 88%, well above the national average.
Median household income is $52,857. 40% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is sales and office, with education and healthcare as the leading industry. The average commute of 29 minutes is near the national average.
College attainment at 15% is below the national average, consistent with a trades and production-oriented local economy.
Health indicators show elevated rates of diabetes (18%), smoking (22%) compared to national benchmarks.
Notable community characteristics include disability rates above the national average at 28%.
Overall, ZIP code 78340 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.
78340 ZIP code map
View map of 78340
Cities in ZIP code 78340
Below are the cities the US Postal Service accepts for ZIP code 78340. Using any city not on this list may result in mail delivery delays.
Nearby ZIP codes
Demographics
updated 06/2026
Population
Total population
396
Population density
19 / sq mi
State FIPS
48
County FIPS
391
Geography
Land area
20.69 sq mi
Water area
14.73 sq mi
Latitude
28.1029
Longitude
-97.2309
Timezone
Central (CT)
Area code
361
Economics
updated 06/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
61.2%
48.6%
39.5%
$50k – $100k
28.4%
37.6%
30.1%
$100k – $200k
10.4%
12.2%
22.6%
Over $200k
0.0%
1.6%
7.8%
Demographics & statistics
$52,857
Median household income
$156,700
Median home value
$1,688
Median monthly rent
15.1%
Bachelor's or higher
Age distribution
Age summary
Group Count % Under 18 32 8.1% 18 and over 364 91.9% 65 and over 126 31.8% Median age 53.4 years
Race & ethnicity
Black or African American
1.2%
Group Count % White 270 52.7% Hispanic or Latino 116 22.7% Two or more races 68 13.3% Other race 52 10.2% Black or African American 6 1.2%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
61.2%
48.6%
39.5%
$50k – $100k
28.4%
37.6%
30.1%
$100k – $200k
10.4%
12.2%
22.6%
Over $200k
0.0%
1.6%
7.8%
Range % of households Under $10k 6.8% $10k–$15k 1.0% $15k–$25k 10.7% $25k–$35k 15.0% $35k–$50k 5.3% $50k–$75k 38.3% $75k–$100k 9.2% $100k–$150k 12.6% $150k–$200k 1.0% Median income $52,857
Housing
Housing overview
Metric Value Median home value $156,700 Median rent / month $1,688 Owner occupied 87.9% Renter occupied 12.1% Vacant 32.7% Single-family detached 94.8% Large apartment buildings 0.0% Mobile homes 3.9% Median rooms 4.3 Avg household size (owned) 1.69
Year built
Era % 2020 or later 2.0% 2010–2019 21.2% 2000–2009 10.8% 1990–1999 12.4% 1980–1989 12.7% 1970–1979 18.6% 1960–1969 4.2% 1950–1959 2.0% 1940–1949 11.4% 1939 or earlier 4.6%
Bedrooms
Size % of units No bedroom (studio) 1.0% 1 bedroom 18.3% 2 bedrooms 39.5% 3 bedrooms 37.3% 4 bedrooms 2.9% 5+ bedrooms 1.0%
Vehicles per household
Vehicles % of households No vehicle 10.2% 1 vehicle 32.5% 2 vehicles 49.0% 3 or more 8.3%
Heating fuel
Fuel type % Utility gas 0.5% Electricity 80.6% Propane / LP gas 12.1% No fuel used 6.8%
Households & families
Household type Count % Married-couple family 86 41.7% Cohabiting couple 16 7.8% Male householder, no spouse 68 33.0% Female householder, no spouse 36 17.5% Households with children under 18 11 5.3% Households with seniors (65+) 88 42.7% Average household size 1.92
Marital status
Status Male Female Never married 30.1% 15.8% Married 37.2% 53.6% Separated 7.1% 0.0% Widowed 14.2% 20.8% Divorced 11.5% 9.8%
Education
Less than 9th grade
16.0%
Some college, no degree
21.8%
Graduate / professional
5.8%
Metric % HS diploma or higher 78.2% Bachelor's or higher 15.1%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 0 0.0% Kindergarten 10 25.6% Elementary school 10 25.6% High school 17 43.6% College / grad school 2 5.1%
Employment
Industry of employment
Education & healthcare
31.5%
Transportation & utilities
10.7%
Professional & management
8.6%
Agriculture & mining
8.1%
Arts, food & hospitality
4.1%
Finance & real estate
0.5%
Occupation
Category % Management, business & arts 17.8% Service 16.8% Sales & office 36.5% Natural resources & construction 22.8% Production & transportation 6.1%
Employment type
Type % Private sector 76.6% Government 21.8% Self-employed 1.5% Unpaid family workers 0.0%
Commute
Method % Drive alone 90.7% Carpool 6.2% Public transit 0.0% Walk 0.0% Work from home 2.1% Other means 1.0% Avg commute (minutes) 29.1
Poverty
Married-couple families
0.0%
Female-led households
0.0%
Income support
Source % of households Social Security 39.8% Retirement income 21.4% Supplemental Security 12.6% Cash public assistance 1.5% Food stamps / SNAP 5.3%
Health indicators
Condition % Obesity 39.5% High blood pressure 45.5% High cholesterol 43.3% Diabetes 17.5% Heart disease 10.4% Stroke 4.6% Asthma 9.5% Arthritis 31.9% Kidney disease 4.2% Pulmonary disease 10.7% Cancer 8.0%
Behavior / access % Smoking 22.1% Binge drinking 14.9% No physical activity 30.9% Less than 7 hrs sleep 34.2% Depression 22.4% Fair or poor health 23.9% Poor mental health 15.0% Poor physical health 15.6% No health insurance 26.0% Visited doctor (checkup) 74.3% Visited dentist 50.9% Cholesterol screening 92.3% Teeth loss 17.4%
Veterans & disability
Veterans Count % Civilian veterans 35 9.6%
Disability % Any disability 27.8% Under 18 0.0% 18–64 years 11.8% 65 and over 65.1%
Health insurance coverage
Type % Private insurance 51.8% Public insurance 46.7% No insurance 14.4% Uninsured under 19 5.1%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 396 100.0% Spanish 30 7.6% Other Indo-European 30 7.6% Asian & Pacific Islander 0 0.0% Other languages 0 0.0%
Place of birth & citizenship
Origin Count % Native born (US) 395 99.7% Born in same state 393 99.2% Born in different state 290 73.2% Foreign born 2 0.5% Naturalized citizen 1 0.3% Not a US citizen 1 100.0%
Ancestry
Ancestry Count % Italian 62 15.7% French 29 7.3%
Ancestry Count % Polish 6 1.5% Irish 3 0.8%
Technology access
Metric % of households Computer access 52.0% Internet access 79.6%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 78340
What city is ZIP code 78340 in?
ZIP code 78340 is primarily assigned to Bayside, Texas.
What county is ZIP code 78340 in?
ZIP code 78340 falls within Refugio County, Texas.
Does ZIP code 78340 have an older population?
32% of residents in ZIP code 78340 are 65 or older, above the national average of ~17%.
Is ZIP code 78340 mostly owner-occupied?
88% of occupied units in ZIP code 78340 are owner-occupied, well above the national average.
Does ZIP code 78340 have a large retiree population?
40% of households in ZIP code 78340 receive Social Security income, suggesting a significant retiree or disability population.
Does ZIP code 78340 have a large veteran population?
10% of civilians in ZIP code 78340 are veterans, above the national average of ~7%.
What timezone is ZIP code 78340 in?
ZIP code 78340 observes the CST timezone.
Need the complete ZIP code database?
Download all 42,000+ US ZIP codes — Excel, CSV, or Access. Includes lat/lng, county FIPS & timezone.
Download database →
