San Marcos, Texas Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
San Marcos, TX Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
-
B
Health Around average
-
D
Income Well below average
-
D
Education Well below average
Source: Map AI Methodology
Population
| Metric | San Marcos | Texas Avg | U.S. Average |
|---|---|---|---|
| Population | 46,254 | 30,160,889 | 337,468,954 |
| Population density (per sq mi) | 1154.5 | 112.2 | 86.4 |
| Population growth (%/yr) | 4.70% | 1.41% | 0.59% |
| Median age | 23.8 | 35.9 | 37.3 |
| Households | 17,704 | 10,982,153 | 130,235,071 |
Population in San Marcos grew by 59.2% from 2009 to 2024, reaching 46,254 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in San Marcos is Gen Z, aged 13–28, at 53.3% of residents. That is 29.8 points above Texas as a whole.
- Gen Z 13–28 24,655 53.3% +29.8 pts
- Millennials 29–44 7,762 16.8% -6.1 pts
- Gen X 45–60 4,808 10.4% -9.1 pts
- Boomers 61–79 3,569 7.7% -5.5 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Texas, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 51.6% of the people living in San Marcos and men 48.4%.
- Women 51.6% Texas 50.1%
- Men 48.4% Texas 49.9%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in San Marcos
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
San Marcos has a the economy index of D, which means it is barely prosperous.
| Metric | San Marcos | Texas Avg | U.S. Average |
|---|---|---|---|
| Median household income | $48,697 | $78,939 | $80,455 |
| Income growth (%/yr) | 5.81% | 4.56% | 4.80% |
| Unemployment rate | 5.5% | 5.2% | 5.2% |
The median household income in San Marcos is about 38% lower than in Texas.
Housing
| Metric | San Marcos | Texas Avg | U.S. Average |
|---|---|---|---|
| Median home price | $440,924 | $258,873 | $248,835 |
| Median rent | $1,305 | $1,402 | $1,407 |
| Homeownership rate | 26.6% | 62.6% | 65.2% |
The median home price in San Marcos is about 28.2 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,305 per month for that long.
Commute Time & Mobility
Commuters in San Marcos spend about 36 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 151 hours, about 6.3 full days, spent commuting.
| Metric | San Marcos | Texas Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 18.1 | 22.8 | 22.4 |
| Round-trip commute (min) | 36.2 | 45.6 | 44.8 |
| Yearly time spent (hours) | 151 | 190 | 187 |
| Estimated yearly cost | $4,671 | $5,888 | $5,790 |
| Work from home | 9.8% | 14.4% | 15.0% |
| Highway traffic (vehicles/day) | 30,663 | 9,879 | 8,813 |
| Local road traffic (vehicles/day) | 2,661 | 1,441 | 1,355 |
The average commute time in San Marcos is 18 minutes, shorter than the 23 minutes in Texas.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
San Marcos has a education index of D, which means it is barely educated.
| Metric | San Marcos | Texas Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 23.1% | 29.3% | 31.6% |
| Average household size | 2.23 | 2.69 | 2.53 |
Health
San Marcos has a health index of B, which means it is quite healthy.
| Metric | San Marcos | Texas Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 77.5 | 78.0 | 78.3 |
| Self-rated poor health | 16.3% | 21.1% | 16.3% |
| Smokers | 16.2% | 19.9% | 19.0% |
San Marcos, TX Compared With Nearby Cities
How San Marcos, TX compares with the 1 cities closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| San Marcos, TX | 46,254 | $48,697 #2/2 | $440,924 #2/2 | 18.1 min #1/2 |
| Kyle, TX | 43,732 | $89,894 | $554,329 | 32.1 min |
Frequently Asked Questions
Common questions about San Marcos, Texas.
How big is San Marcos, Texas by population?
About 46,254 people live in San Marcos, Texas, in 17,704 households of 2.2 people on average. The median age is 23.8, so residents are younger than the U.S. median of 37.3 by about 13 years.
Is San Marcos, Texas mostly urban or rural?
Averaged over its land area, San Marcos, Texas has 1,155 people per square mile, a density typical of urban and suburban areas. That is about 13 times the U.S. average of 86.
Is San Marcos, Texas an affordable place to live?
The median home costs 9.1 times the median household income ($440,924 against $48,697), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $1,305 a month takes about 32% of the median household's income, above the 30% level at which HUD considers renters cost-burdened.
What share of adults in San Marcos, Texas have a college degree?
23.1% of adults in San Marcos, Texas hold a bachelor's degree or higher (about 1 in 4), well below the U.S. share of 31.6%.
Analyze any area in the US
Get local demographics for any address, aggregated by drive time or radius, on the interactive map.
Explore the map →