San Marcos Flag

San Marcos

County:
Hays County
County Seat:
Yes
Area (mi²):
40.421
State:
Texas

San Marcos is a city located in Hays County, Texas. San Marcos has a 2026 population of 77,362. It is also the county seat of Hays County. San Marcos is currently growing at a rate of 2.01% annually and its population has increased by 13.39% since the most recent census, which recorded a population of 68,224 in 2020.

The median household income in San Marcos is $51,281 with a poverty rate of 26.93%. The median age in San Marcos is 25.5 years: 26.1 years for males, and 24.9 years for females. For every 100 females there are 86.1 males.

77.4K
Total Population
1,914
Density (mi²)
1.5K 2.01%
Growth

San Marcos Population

San Marcos Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202677,3621,5232.01%
202575,8391,5232.05%
202474,3162,3833.31%
202371,9331,3911.97%
202270,5421,1721.69%
202169,3701,1461.68%
202068,2244420.65%
201964,7529501.49%
201863,8021860.29%
201763,6161,8342.97%
201661,7821,3162.18%
201560,4661,4692.49%
201458,9974,5888.43%
201354,4094,3998.8%
201250,0102,3224.87%
201147,6882,4305.37%
201045,2581290.29%
200034,7335,99020.84%
199028,7435,32322.73%
198023,4204,56024.18%
197018,8606,14748.35%
196012,7132,73327.38%
19509,9803,97466.17%
19406,00687216.98%
19305,13460713.41%
19204,52745611.2%
19104,071-77,860-95.03%

Median Age

Overall: 25.5 years
Female: 24.9 years
Male: 26.1 years

San Marcos Adults

There are 61,499 adults, (7,637 of whom are seniors) in San Marcos.

Sex Ratio

Female: 38,090 (53.7%)
Male: 32,807 (46.3%)

Demographics

The racial composition of San Marcos includes 58.81% White, 9.1% other race, 5.69% Black or African American, and smaller percentages for Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White41,69158.81%
Two or more races16,70023.56%
Other race6,4539.1%
Black or African American4,0325.69%
Asian1,5952.25%
Native American4160.59%
Native Hawaiian or Pacific Islander100.01%
Race
Population ↓
Percentage (of total)
Two or more races13,94919.68%
White10,07414.21%
Other race5,1197.22%
Native American3630.51%
Black or African American3340.47%
Asian940.13%
Race
Population ↓
Percentage (of total)
White31,61744.6%
Black or African American3,6985.22%
Two or more races2,7513.88%
Asian1,5012.12%
Other race1,3341.88%
Native American530.07%
Native Hawaiian or Pacific Islander100.01%

San Marcos Marital Status

Economics and Income Statistics

San Marcos ' average per capita income is $39,515. Household income levels show a median of $51,281. The poverty rate stands at 26.93%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$88,080-
Families$67,077$88,167
Households$51,281$66,133
Non Families$37,864$48,036

$39,515

Average Income

$51,281

Median Household Income

26.93%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)