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.
According to the most recent ACS, the racial composition of San Marcos was:
White
Two or more races
Black or African American
Other race
Asian
Native American
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 25,732 | 2.29 | 26.2 | 73.8 |
| Non Family | 14,680 | 1.74 | 13.1 | 86.9 |
| Married | 6,929 | 2.99 | 55.3 | 44.7 |
| Female | 2,814 | 3.1 | 21.7 | 78.3 |
| Male | 1,309 | 3.11 | 29.1 | 70.9 |
2.89
Average Family Size
2.29
Average Household Size
26.2%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
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.
rate
30.59%
Overall Poverty Rate
24.69%
Male Poverty Rate
36.06%
Female Poverty Rate
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%.
Married
Widowed
Divorced
Separated
NeverMarried
26.2%
Overall Marriage Rate
26.4%
Male Marriage Rate
26.1%
Female Marriage Rate
male
female
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.
Married
Widowed
Divorced
Separated
NeverMarried
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
11.89%
Veteran Poverty Rate
27.1%
Veteran Disability Rate
LaborForceParticipation
65.9%
Labor Force Participation
60.6%
Employment Rate
7.8%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
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.
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
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.
Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 1910 | 4,071 | -71,966 | 2.49% |
| 1920 | 4,527 | 456 | 1.07% |
| 1930 | 5,134 | 607 | 1.27% |
| 1940 | 6,006 | 872 | 1.58% |
| 1950 | 9,980 | 3,974 | 5.21% |
| 1960 | 12,713 | 2,733 | 2.45% |
| 1970 | 18,860 | 6,147 | 4.02% |
| 1980 | 23,420 | 4,560 | 2.19% |
| 1990 | 28,743 | 5,323 | 2.07% |
| 2000 | 34,733 | 5,990 | 1.91% |
| 2010 | 44,894 | ||
| 2011 | 47,160 | 2,266 | 5.05% |
| 2012 | 49,426 | 2,266 | 4.8% |
| 2013 | 51,692 | 2,266 | 4.58% |
| 2014 | 53,958 | 2,266 | 4.38% |
| 2015 | 56,224 | 2,266 | 4.2% |
| 2016 | 58,490 | 2,266 | 4.03% |
| 2017 | 60,756 | 2,266 | 3.87% |
| 2018 | 63,022 | 2,266 | 3.73% |
| 2019 | 65,288 | 2,266 | 3.6% |
| 2020 | 67,701 | 2,413 | 3.7% |
| 2021 | 68,580 | 879 | 1.3% |
| 2022 | 69,470 | 890 | 1.3% |
| 2023 | 70,372 | 902 | 1.3% |
| 2024 | 71,286 | 914 | 1.3% |
| 2025 | 72,212 | 926 | 1.3% |
| 2026 | 73,150 | 938 | 1.3% |
| 2027 | 74,100 | 950 | 1.3% |
| 2028 | 75,062 | 962 | 1.3% |
| 2029 | 76,037 | 975 | 1.3% |