78666 Zip Code

Below you will find a comprehensive overview of the statistics and characteristics of the 78666 zip code. These include population demographics, economic characteristics, education data, occupation information, housing characteristics, and more.

Key Information:
StateTexas
CitySan Marcos
Time ZoneAmerica/Chicago
Geo Location29.87958, -97.96642
Population83858
Size457.38 square miles
Median Family Income$58009.00
Median Home Value$202500.00

Population & Demographics

The following information lists the population statistics and breakdown for the 78666 zip code. The total population is 83858, of which, 40597 are male and 43261 are female. With a total area of 457.38 square miles, the population density is 181.3 people per square mile. The median age of the population is 26.3 years old. Below you’ll find additional information on the population and demographics of this zip code, including age distribution, race distribution, language spoken, and more.

YearPopulation
201161953
201263255
201366027
201468704
201572866
201675968
201777355
201879276
201982923
202081844
202183858

Age BracketNumber of PeoplePercentage of Population
Under 5 years old 30473.6%
Age 5-930123.6%
Age 10-1440414.8%
Age 15-19967511.5%
Age 20-241929423
Age 25-2983019.9%
Age 30-3451996.2%
Age 35-3944475.3%
Age 40-444496 5.4%
Age 45-4933944%
Age 50-5433354%
Age 55-5931493.8%
Age 60-6434154.1%
Age 65-6926893.2%
Age 70-7427803.3%
Age 75-7915471.8%
Age 80-848951.1%
Age 85 and over11421.4%


Languages Spoken (of those 5 years of age and older) :
  • Speaks Language other than English: 29.5 %
  • Speaks Spanish: 25.8 %
  • Speaks Other Indo-European Language: 2.5 %
  • Speaks Pacific Island Languages: 1 %
  • Speak Other Languages: 0.2 %
Marital Status: 
  • Currently Married: 31 %
  • Divorced: 8.4 %
  • Separated (not divorced): 1.6 %
  • Never Married: 55.6 %

Income & Economic Characteristics

The median inflation-adjusted family income in the 78666 zip code is $58009. This is -27.85% less than the national average. This income places 26.8% of the population below the poverty line. The average retirement income for individuals in this zip code (for those that have it) is $21994. Below you can find additional economic characteristics, including income bracket distribution, median income over time, retirement statistics, and more.

Annual Income Bracket ($)Number of Families in Bracket
Less than $10,000.00768
$10,000.00 – $14,999.00283
$15,000.00 – $24,999.001337
$25,000.00 – $34,999.001516
$35,000.00 – $49,999.001979
$50,000.00 – $74,999.003514
$75,000.00 – $99,999.002268
$100,000.00 – $149,999.001839
$150,000.00 – $199,999,00888
$200,000.00 +1027

YearMedian Family Income ($ USD)
201153929
201255515
201356362
201453380
201551628
201652001
201754397
201856379
201959193
202058430
202158009

Income Source# of Households
Wage or Salary25777
Self Employment2597
Social Security6068
Dividends, Interest, or Rental3817
Retirement4838
Other4436

Total Insured & Uninsured Individuals: 
  • Families Insure: 69097
  • Families Uninsured: 13784
Total Individuals with and w/o retirement income:   
  • Yes retirement income: 4838
  • No retirement income: 26973

Education

In the 78666 zip code, 87.9% of individuals over 25 years old have a high school degree or higher, and 32% have a bachelors degree or higher. Additionally, 6.7% of individuals 3 years and older are in private school, and 93.3% are in public school. The data below outline the education level breakdown, degree field breakdown, and more.




Occupation and Work Characteristics

In the 78666 zip, there are an estimated 47302 people in the labor force, of which, 43881 are employed, and 3329 are unemployed. There are a total of 92 people in the armed forces. The average commute time for this zip code is 23.3 minutes. Of the total people that work, 3010 worked from home and 43235 commuted. The average number of hours worked is 35.7. Below you’ll find additional information on occupation distribution, industry breakdown, commuting characteristics and workplace statistics.

Occupation# of Individual
Management, Business, Science, and Arts14132
Services10682
Sales and Office10167
Construction and Maintenance:3338
Transportation and Material Moving5562





Housing

The median home value for the 78666 zip code is 202500. There is an estimated  31811 number of occupied housing units, the median gross rent in is $1159 per month, and the average monthly housing costs are estimated to be $1155. Below you’ll find additional breakdowns of home values, rents, home build years, and more.

Home Value (USD)Number of Homes
Less than $50,0001053
$50,000 – $99,0001192
$100,000 – $149,9991710
$150,000 – $199,9991599
$200,000 – $299,9993150
$300,000 – $499,9992007
$500,000 – $999,999452
$1,000,000+90

Home Year BuiltNumber of Homes
2020 or Later78
2010 – 20196777
2000 – 20096338
1980 – 199910963
1960 – 19794976
1940 – 19592058
1939 or earlier621

The median number of rooms in all housing units is 4.7 rooms.
Monthly Rent ($ USD)Number of Units
Less than $500432
$500 – $9995830
$1,000 – $1,4999561
$1,500 – $1,9992829
$2,000 – $2,4991109
$2,499 – $2,9990
$3,000 + 80

Monthly Housing Costs ($)Number of Households
Less than 300910
300-4991613
500-7994343
800-9994276
1000-149911967
1500-19994939
2000-24992121
2500-2999411
3000+514

Monthly Housing Cost as a % of Monthly IncomeNumber of Households
Less than 20%2419
20%-24.9%1300
25%-29.9%964
30%-34.9%575
35+%1476



# of VehiclesHouseholds
None1948
110981
211894
3+6988
Home Heating Characteristics: 
  • Utility Gas: 19.8 %
  • Bottle Tank or LP Gas: 2.5 %
  • Electricity: 77.2 %
  • Oil or Kerosene etc: 0 %
  • Coal or Coke: 0 %
  • All Other: 0.5 %

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All information sourced from official government sources including Census.gov, the IRS, and the Department of Education.