Where does this demographic data come from?

All demographic data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates, which samples about 3.5 million households annually. The 5-year estimates provide the most reliable data for small geographies like municipalities.

What is the difference between Census data and ACS data?

The decennial Census (conducted every 10 years) is a full population count focusing on basic demographics. The ACS is an ongoing survey that collects detailed data on income, education, housing, commute patterns, and more. ACS data is updated annually but represents averages over a 5-year period.

How accurate is this data for small towns?

For smaller municipalities, ACS estimates have wider margins of error because fewer residents are sampled. The 5-year estimates reduce this uncertainty by averaging over a longer period. For towns under 5,000 people, treat specific numbers as approximations rather than precise counts.

San Marcos, TX Population, Income & Demographics 2026

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Demographics — 2024 ACS 5-Year Estimatesi

Census

Populationi

70,897

Median Agei

25.5

Race & Ethnicityi

White

44.6%31,617

Hispanic/Latino

42.2%29,933

Black

5.2%3,698

Two or More

3.9%2,751

Asian

2.1%1,501

Other

1.9%1,334

American Indian/Alaska Native

0.1%53

Native Hawaiian/Pacific Islander

0%10

Educational Attainment (Age 25+)i

GED/Alternative

3.2%1,165

High School Diploma

19.2%7,014

Some College (<1 yr)

6.4%2,356

Some College (1+ yr)

15.9%5,813

Associate's Degree

7.5%2,744

Bachelor's Degree

23.7%8,679

Master's Degree

9.8%3,574

Professional Degree

1.6%603

Doctorate

3.1%1,151

HS or Higher

90.5%

BA or Higher

38.3%

Graduate+

14.6%

Housingi

Median Home Valuei

$310,400

Median Renti

$1,322

Tenure

Owner-Occupied

30.8%8,630

Renter-Occupied

69.2%19,383

Total Units

30,349

Homeownership

30.8%

Vacancy Rate

7.7%

Rent Distribution

Under $500

380

$500–$750

729

$750–$1,000

3,064

$1,000–$1,250

4,045

$1,250–$1,500

4,031

$1,500–$2,000

4,537

$2,000+

1,975

Year Built

2020 or later

7.1%2,153

2010–2019

25.8%7,830

2000–2009

18.9%5,734

1990–1999

11%3,327

1980–1989

14.2%4,319

1970–1979

9.4%2,839

1960–1969

4.4%1,341

1950–1959

4.5%1,357

1940–1949

2.4%742

1939 or earlier

2.3%707

Heating Fuel

Electricity

70.8%19,824

Utility Gas

26.2%7,340

Bottled/LP Gas

2.5%687

No Fuel

0.5%127

Coal

0.1%16

Solar

0%10

Other

0%9

Economyi

Median Household Incomei

$51,281

Mean Household Incomei

$66,133

Per Capita Incomei

$27,545

Poverty Ratei

24.3%

Unemploymenti

5.1%

Labor Forcei

42,046

Ancestry & Heritage

Self-reported ancestry groups. Residents may report multiple ancestries, so totals may exceed 100%.

Foreign-Born Populationi

Foreign-Borni

6,4769.1%

By Region

Top Countries

Mexico

1,902

China

210

India

153

Germany

145

Philippines

144

Canada

Poland

Korea

Workforce

Total Employed

39,728

Occupations

Industries

Social Characteristicsi

Veteransi

2,911(4.7% of civilian adults)

Health Insurancei

83.6%Insured

16.4%Uninsured