San Marcos, Texas Population 2023

70,372

San Marcos is a city located in Caldwell County, Guadalupe County, and Hays County Texas. San Marcos has a 2023 population of 70,372. It is also the county seat of Hays County.San Marcos is currently growing at a rate of 1.3% annually and its population has increased by 3.95% since the most recent census, which recorded a population of 67,701 in 2020.

The average household income in San Marcos is $53,519 with a poverty rate of 30.59%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in San Marcos is 24.9 years, 25.7 years for males, and 24.2 years for females.

San Marcos Demographics

According to the most recent ACS, the racial composition of San Marcos was:

  • White: 72.43%
  • Two or more races: 12.58%
  • Black or African American: 6.87%
  • Other race: 5.01%
  • Asian: 2.59%
  • Native American: 0.42%
  • Native Hawaiian or Pacific Islander: 0.08%
State
Texas
Land Area (mi²)
34.1 sq mi
Density (mi²)
2,061.50/sq mi
Growth Rate
1.3% (902)
Growth Since 2020
3.95% (2,671)
The current population of San Marcos, Texas is 70,372 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 67,701.

San Marcos, Texas Population 2023

Population by Race

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Race
Population
Percentage (of total)
White46,94572.43%
Two or more races8,15412.58%
Black or African American4,4556.87%
Other race3,2505.01%
Asian1,6782.59%
Native American2750.42%
Native Hawaiian or Pacific Islander550.08%
showing: 7 rows

White

Two or more races

Black or African American

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

San Marcos Population by Race

San Marcos Population Pyramid 2023

San Marcos Median Age

24.9

Total

25.7

Male

24.2

Female

San Marcos Adults

There are 56,412 adults, (6,034 of whom are seniors) in San Marcos.

San Marcos Age Dependency

28.7

Age Dependency Ratio

12

Old Age Dependency Ratio

16.7

Child Dependency Ratio

San Marcos Sex Ratio

Female34,02652.5%
Male30,78647.5%

San Marcos Population by Age

San Marcos Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All25,7322.2926.273.8
Non Family14,6801.7413.186.9
Married6,9292.9955.344.7
Female2,8143.121.778.3
Male1,3093.1129.170.9
showing: 5 rows

2.89

Average Family Size

2.29

Average Household Size

26.2%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

San Marcos Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

San Marcos Educational Attainment by Sex (over 25)

San Marcos Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among other race people with a rate of 66.66%.

The highest rate of bachelors degrees is among asian people with a rate of 33.73%.

San Marcos Educational Attainment by Race

All

Male

Female

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$32,850

Average Earnings

$34,672

Average Male

$27,369

Average Female

San Marcos Earnings by Educational Attainment

San Marcos Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

San Marcos Language

71.73% of San Marcos residents speak only English, while 28.27% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 23.75% of the population.

San Marcos Language

San Marcos Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White26,9718,74832.43%
Hispanic24,5506,51526.54%
Black3,2961,45444.11%
Multiple7,5181,39718.58%
Other3,15181425.83%
Asian1,46243729.89%
Islander551527.27%
showing: 7 rows

30.59%

Overall Poverty Rate

24.69%

Male Poverty Rate

36.06%

Female Poverty Rate

Poverty in San Marcos

The race most likely to be in poverty in San Marcos is Black, with 44.11% below the poverty level.

The race least likely to be in poverty in San Marcos is Multiple, with 18.58% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 8.05%. Among those working part-time, it was 45.69%, and for those that did not work, the poverty rate was 42.99%.

San Marcos Poverty

rate

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Rate
Poverty
Some College26.39%
Less Than 9th Grade18.25%
High School17.88%
Bachelors or Greater7.24%
showing: 4 rows

San Marcos Poverty Rate by Education

rate

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Rate
Poverty
Male Unemployed61.94%
Female Unemployed44.25%
Female Employed26.81%
Male Employed15.92%
showing: 4 rows

San Marcos Poverty Rate by Employment Status and Sex

San Marcos Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

San Marcos Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

26.2%

Overall Marriage Rate

26.4%

Male Marriage Rate

26.1%

Female Marriage Rate

San Marcos Married by Age and Sex

male

female

San Marcos Marriage

The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 45-54.

San Marcos Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

San Marcos Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

2,694

Number of Veterans

2,472

Male Veterans

222

Female Veterans

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San Marcos Veterans by War

count

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San Marcos Veterans by Age

count

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San Marcos Veterans by Race

San Marcos Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

11.89%

Veteran Poverty Rate

27.1%

Veteran Disability Rate

San Marcos Veterans by Education

LaborForceParticipation

65.9%

Labor Force Participation

60.6%

Employment Rate

7.8%

Unemployment Rate

San Marcos Employment by Age

LaborForceParticipation

San Marcos Employment by Race

LaborForceParticipation

San Marcos Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

75.82%

Born in San Marcos

101.16%

Native Born

8.77%

Foreign Born

6.02%

Non Citizen

2.76%

Naturalized

Place of Birth

101.16% of San Marcos residents were born in the United States, with 75.82% having been born in Texas. 6.02% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

San Marcos Place of Birth

Note: data after 2021 is projected based on recent change

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Year
Population
Growth
Growth Rate
19104,071-71,9662.49%
19204,5274561.07%
19305,1346071.27%
19406,0068721.58%
19509,9803,9745.21%
196012,7132,7332.45%
197018,8606,1474.02%
198023,4204,5602.19%
199028,7435,3232.07%
200034,7335,9901.91%
201044,894
201147,1602,2665.05%
201249,4262,2664.8%
201351,6922,2664.58%
201453,9582,2664.38%
201556,2242,2664.2%
201658,4902,2664.03%
201760,7562,2663.87%
201863,0222,2663.73%
201965,2882,2663.6%
202067,7012,4133.7%
202168,5808791.3%
202269,4708901.3%
202370,3729021.3%
202471,2869141.3%
202572,2129261.3%
202673,1509381.3%
202774,1009501.3%
202875,0629621.3%
202976,0379751.3%
showing: 30 rows

San Marcos Population by Year