San Marcos demographics profile

StatisticSan MarcosTexasNational
Population density (sq mi)1,7119791
Median age23.734.237.7
Male/Female ratio0.9:11.0:11.0:1
Married (15yrs & older)26%56%55%
Families w/ Kids under 1848%48%43%
Speak English73%65%79%
Speak Spanish24%30%13%
San Marcos, TX has a population of 57,743 and is the 690th largest city in the United States. The population density is 1,711 per sq mi which is 1665% higher than the Texas average and 1788% higher than the national average. The median age in San Marcos is 24 which is approximately 31% lower than the Texas average of 34. In San Marcos, 26% of the population over 15 years of age are married, 73% speak English and 24% speak Spanish. 71% of San Marcos residents were born in Texas, 20% were born out of state, 2% were born outside of the United States and 7% were foreign born.
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Did you know?

  • The population density in San Marcos is 1665% higher than Texas.
  • The median age in San Marcos is 31% lower than Texas.
  • In San Marcos 83.81% of the population is White.
  • In San Marcos 4.83% of the population is Black or African American.
  • In San Marcos 2.11% of the population is Asian.

Compare San Marcos, TX Demographics To Other Cities

San Marcos population breakdown by race

RaceSan MarcosTexasNational
Black or African American4.83%11.95%12.63%
American Indian0.37%0.48%0.82%
Native Hawaiian0.01%0.08%0.18%
Mixed race3.59%2.50%3.06%
Other race5.28%5.79%4.75%
In San Marcos, 42.6% of people are of Hispanic or Latino origin.
Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

Languages spoken

Place of birth by citizenship

Household income distribution

Source of income

San Marcos age breakdown

Marital status

Age of children in married couples

Source: The San Marcos, TX demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).
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