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Texas ZIP Codes
Matagorda County
Markham, TX
77456
77456 ZIP Code — Markham, TX
Matagorda County, Texas
ZIP code 77456 is located in
Markham ,
Texas ,
within Matagorda County .
It covers approximately 39.57 square miles and serves a population of
1,345 residents.
This is a standard ZIP code in the Central (CT) timezone,
served by area code 979 .
About ZIP code 77456
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 $117,900. Owner-occupancy is high at 84%, well above the national average.
Median household income is $58,443. Poverty affects 19% of residents, above the national average. SNAP benefit usage at 23% of households reflects economic stress in the area. 49% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is production, transportation, and material moving, with arts, entertainment, and food service as the leading industry. The average commute of 27 minutes is near the national average.
College attainment at 16% is below the national average, consistent with a trades and production-oriented local economy.
21% of residents lack health insurance, above the national average.
Overall, ZIP code 77456 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.
77456 ZIP code map
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Cities in ZIP code 77456
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Demographics
updated 06/2026
Population
Total population
1,345
Population density
34 / sq mi
State FIPS
48
County FIPS
321
Geography
Land area
39.57 sq mi
Water area
0.23 sq mi
Latitude
28.9703
Longitude
-96.1039
Timezone
Central (CT)
Area code
979
Economics
updated 06/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
53.8%
50.7%
39.5%
$50k – $100k
34.9%
30.4%
30.1%
$100k – $200k
3.8%
16.0%
22.6%
Over $200k
7.4%
2.9%
7.8%
Demographics & statistics
$58,443
Median household income
$117,900
Median home value
15.5%
Bachelor's or higher
Age distribution
Age summary
Group Count % Under 18 534 39.7% 18 and over 811 60.3% 65 and over 211 15.7% Median age 20.7 years
Race & ethnicity
Black or African American
3.6%
Group Count % White 971 59.5% Hispanic or Latino 287 17.6% Two or more races 259 15.9% Black or African American 58 3.6% Other race 57 3.5%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
53.8%
50.7%
39.5%
$50k – $100k
34.9%
30.4%
30.1%
$100k – $200k
3.8%
16.0%
22.6%
Over $200k
7.4%
2.9%
7.8%
Range % of households Under $10k 5.6% $10k–$15k 9.7% $15k–$25k 9.1% $35k–$50k 11.3% $50k–$75k 57.3% $200k+ 7.0% Median income $58,443
Housing
Housing overview
Metric Value Median home value $117,900 Median rent / month $850 Owner occupied 84.4% Renter occupied 15.6% Vacant 16.0% Single-family detached 71.6% Large apartment buildings 0.0% Mobile homes 28.4% Median rooms 5.9 Avg household size (owned) 3.36
Year built
Era % 2020 or later 0.0% 2010–2019 5.6% 2000–2009 7.7% 1990–1999 10.6% 1980–1989 0.0% 1970–1979 24.2% 1960–1969 22.6% 1950–1959 9.3% 1940–1949 7.7% 1939 or earlier 12.4%
Bedrooms
Size % of units No bedroom (studio) 0.0% 1 bedroom 2.7% 2 bedrooms 23.3% 3 bedrooms 26.4% 4 bedrooms 43.6% 5+ bedrooms 4.1%
Vehicles per household
Vehicles % of households No vehicle 9.1% 1 vehicle 9.7% 2 vehicles 45.7% 3 or more 35.5%
Heating fuel
Fuel type % Utility gas 27.7% Electricity 66.4% Propane / LP gas 5.9%
Households & families
Household type Count % Married-couple family 206 55.4% Cohabiting couple 78 21.0% Male householder, no spouse 44 11.8% Female householder, no spouse 44 11.8% Households with children under 18 169 45.4% Households with seniors (65+) 183 49.2% Average household size 3.62
Marital status
Status Male Female Never married 33.8% 52.7% Married 59.8% 44.0% Separated 0.0% 0.0% Widowed 6.4% 3.2% Divorced 0.0% 0.0%
Education
Some HS, no diploma
12.2%
Some college, no degree
25.4%
Graduate / professional
2.5%
Metric % HS diploma or higher 82.5% Bachelor's or higher 15.5%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 0 0.0% Kindergarten 53 13.1% Elementary school 165 40.7% High school 153 37.8% College / grad school 34 8.4%
Employment
Industry of employment
Arts, food & hospitality
27.2%
Finance & real estate
19.1%
Transportation & utilities
14.8%
Agriculture & mining
9.9%
Occupation
Category % Management, business & arts 19.1% Service 33.6% Sales & office 0.0% Natural resources & construction 4.3% Production & transportation 42.9%
Employment type
Type % Private sector 91.6% Government 0.0% Self-employed 8.4% Unpaid family workers 0.0%
Commute
Method % Drive alone 69.6% Carpool 11.6% Public transit 0.0% Walk 0.0% Work from home 0.0% Other means 18.8% Avg commute (minutes) 26.8
Poverty
Married-couple families
26.7%
Female-led households
100.0%
Income support
Source % of households Social Security 48.7% Retirement income 33.9% Supplemental Security 33.6% Cash public assistance 0.0% Food stamps / SNAP 23.4%
Health indicators
Condition % Obesity 38.3% High blood pressure 35.9% High cholesterol 35.2% Diabetes 12.7% Heart disease 6.7% Stroke 3.1% Asthma 9.3% Arthritis 23.7% Kidney disease 3.0% Pulmonary disease 6.9% Cancer 5.9%
Behavior / access % Smoking 18.7% Binge drinking 18.0% No physical activity 25.8% Less than 7 hrs sleep 34.7% Depression 21.7% Fair or poor health 18.3% Poor mental health 15.5% Poor physical health 11.8% No health insurance 28.0% Visited doctor (checkup) 70.4% Visited dentist 53.6% Cholesterol screening 88.9% Teeth loss 14.1%
Veterans & disability
Veterans Count % Civilian veterans 0 0.0%
Disability % Any disability 9.7% Under 18 16.9% 18–64 years 3.8% 65 and over 8.5%
Health insurance coverage
Type % Private insurance 40.1% Public insurance 50.9% No insurance 20.8% Uninsured under 19 19.3%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 1,087 80.8% Spanish 10 0.9% Other Indo-European 10 0.9% Asian & Pacific Islander 0 0.0% Other languages 0 0.0%
Place of birth & citizenship
Origin Count % Native born (US) 1,339 99.6% Born in same state 1,339 99.6% Born in different state 611 45.4% Foreign born 0 0.0% Naturalized citizen 6 0.4% Not a US citizen 6 100.0%
Ancestry
Ancestry Count % Arab 257 19.1%
Ancestry Count % French 204 15.2%
Technology access
Metric % of households Computer access 27.7% Internet access 85.5%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 77456
What city is ZIP code 77456 in?
ZIP code 77456 is primarily assigned to Markham, Texas.
What county is ZIP code 77456 in?
ZIP code 77456 falls within Matagorda County, Texas.
Is ZIP code 77456 family-oriented?
40% of residents in ZIP code 77456 are under 18, reflecting a younger, family-oriented community.
Does ZIP code 77456 have a large retiree population?
49% of households in ZIP code 77456 receive Social Security income, suggesting a significant retiree or disability population.
What is the poverty rate in ZIP code 77456?
19% of residents in ZIP code 77456 live below the poverty line, above the national average.
Is ZIP code 77456 mostly owner-occupied?
84% of occupied units in ZIP code 77456 are owner-occupied, well above the national average.
What timezone is ZIP code 77456 in?
ZIP code 77456 observes the CST timezone.
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