San Marcos, Texas Population 2020

66,583

San Marcos is a city located in Texas. With a 2020 population of 66,583, it is the 59th largest city in Texas and the 573rd largest city in the United States. San Marcos is currently growing at a rate of 2.36% annually and its population has increased by 48.31% since the most recent census, which recorded a population of 44,894 in 2010. Spanning over 34 miles, San Marcos has a population density of 1,950 people per square mile.

The average household income in San Marcos is $51,463 with a poverty rate of 34.36%. The median rental costs in recent years comes to $1,000 per month, and the median house value is $163,500. The median age in San Marcos is 24.1 years, 25 years for males, and 22.9 years for females. For every 100 females there are 94.8 males.

San Marcos Demographics

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

  • White: 83.94%
  • Black or African American: 6.01%
  • Other race: 4.11%
  • Two or more races: 3.32%
  • Asian: 2.44%
  • Native American: 0.15%
  • Native Hawaiian or Pacific Islander: 0.04%
The current population of San Marcos, Texas is 66,583, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 63,509.The last official US Census in 2010 recorded the population at 44,894.

San Marcos, Texas Population 2020

Population by Race

Race Population Percentage
White51,83283.94%
Black or African American3,7126.01%
Some Other Race2,5394.11%
Two or More Races2,0483.32%
Asian1,5052.44%
American Indian and Alaska Native900.15%
Native Hawaiian and Other Pacific Islander250.04%

San Marcos Population Pyramid 2020

San Marcos Median Age

24.1


Total

25


Male

22.9


Female

San Marcos Adults

There are 52,935 adults, (4,451 of whom are seniors) in San Marcos.

San Marcos Age Dependency

27.4

Age Dependency Ratio

9.2

Old Age Dependency Ratio

18.2

Child Dependency Ratio

San Marcos Sex Ratio

Female

31,700

51.34%

Male

30,051

48.66%

San Marcos Households and Families

San Marcos Renter vs Owner Occupied by Household Type

San Marcos Household Types

Type Owner Renter
Married61.7%38.3%
All27.6%72.4%
Female27%73%
Male20%80%
Non Family13.3%86.7%

27.6%

Rate of Home Ownership

Type Count Average Size Owned
All22,7752.4327.6
Non Family13,1271.8613.3
Married5,8253.1761.7
Female2,5353.3827
Male1,2883.1620

3.05

Average Family Size

2.43

Average Household Size

9.2%

Unmarried (Opposite Sex)

0.5%

Unmarried (Same Sex)

San Marcos Education

Education Attained Count Percentage
Less Than 9th Grade1,5355.33%
9th to 12th Grade2,2047.65%
High School Graduate7,23025.10%
Some College6,35922.07%
Associates Degree1,7926.22%
Bachelors Degree6,53822.70%
Graduate Degree3,14910.93%

San Marcos Educational Attainment by Race

Name Total High School Bachelors
White14,77514,0787,042
Hispanic11,2238,3431,702
Black1,5111,400241
Other Race1,103991215
Asian854842525
Multiple Races737668225
Native American797917
Islander77

The highest rate of high school graduation is among native american people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 61.48%.

Name Average Male Female
Overall$31,845$35,335$28,962
Less Than High School$23,999$26,501$16,798
High School Grad$25,877$28,337$20,831
Some College$31,250$38,275$26,903
Bachelors Degree$40,227$45,689$37,707
Graduate Degree$47,405$51,421$45,154

$31,845

Average Earnings

$35,335

Average Male

$28,962

Average Female

San Marcos Language

San Marcos Language by Age

San Marcos Language

71.18% of San Marcos residents speak only English, while 28.82% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 25.11% of the population.

San Marcos Poverty

San Marcos Poverty by Race

Name Total In Poverty Poverty Rate
White27,3019,72435.62%
Hispanic22,8557,96434.85%
Other2,3131,17650.84%
Black2,67778529.32%
Asian1,31332524.75%
Multiple1,76528716.26%
Islander1818100.00%

34.36%

Overall Poverty Rate

28.11%

Male Poverty Rate

40.48%

Female Poverty Rate

Poverty in San Marcos

The race most likely to be in poverty in San Marcos is Islander, with 100.00% below the poverty level.

The race least likely to be in poverty in San Marcos is Multiple, with 16.26% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 7.65%. Among those working part-time, it was 53.88%, and for those that did not work, the poverty rate was 46.59%.

Name Poverty
Less Than High School24.31%
Some College21.20%
High School17.22%
Bachelors or Greater8.27%
Name Poverty
Female Unemployed65.60%
Male Unemployed55.89%
Female Employed32.54%
Male Employed18.52%

San Marcos Income

San Marcos Income by Household Type

Name Median Mean
Households$37,593$51,463
Families$53,096$69,363
Married Families$68,473-
Non Families$25,924$36,127

San Marcos Marital Status

San Marcos Marital Status

Marriage Rates

23.7%

Overall Marriage Rate

25.2%

Male Marriage Rate

22.4%

Female Marriage Rate

San Marcos Married by Age and Sex

San Marcos Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 55-64.

San Marcos Marital Status by Race

San Marcos Veterans

2,419

Number of Veterans

2,213

Male Veterans

206

Female Veterans

War Veterans
Second Gulf War946
First Gulf War558
Vietnam533
Korea117
World War II58
Age Group Veterans
35 to 54761
18 to 34582
55 to 64367
75+358
65 to 74351
Name Veterans % of Total
White1,9144.28%
Hispanic6163.14%
Black3229.83%
2 or More986.67%
Other713.61%
Hawaiian728.00%
Indian77.78%

$San Marcos Veterans by Education

12.41%

Veteran Poverty Rate

30.98%

Veteran Disability Rate

San Marcos Employment Status

67.1%

Labor Force Participation

61.4%

Employment Rate

8.2%

Unemployment Rate

San Marcos Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

67.80%

Born in Texas

91.20%

Native Born

8.80%

Foreign Born

5.75%

Non Citizen

Place of Birth

91.20% of San Marcos residents were born in the United States, with 67.80% having been born in Texas. 5.75% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Year Population Growth Annual Growth Rate
202066,5831,5372.36%
201965,0461,5372.42%
201863,5094510.72%
201763,0581,5372.50%
201661,5211,2192.02%
201560,3021,3952.37%
201458,9074,5578.38%
201354,3504,3788.76%
201249,9722,3034.83%
201147,6692,4035.31%
201045,26610,5332.68%
200034,7335,9901.91%
199028,7435,3232.07%
198023,4204,5602.19%
197018,8606,1474.02%
196012,7132,7332.45%
19509,9803,9745.21%
19406,0068721.58%
19305,1346071.27%
19204,5274561.07%
19104,0710.00%