San Marcos, TX Demographics
San Marcos, TX is the 58th most populous of 1862 cities in Texas, with 67,553 residents across 37 square miles. That is about 1,804 people per square mile.
At the 2020 census
| Population | 67,553 |
|---|---|
| Land area | 37 sq mi |
| Density | 1,804 / sq mi |
Data: 2020 Decennial Census · land area from Census TIGER/Line
How San Marcos, TX compares to the US
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About this page
City statistics cover the municipal boundary only, not the wider metro area.
Figures come from the 2020 census and the American Community Survey, compared against national averages.