Metrics for San Marcos
Population
| People | Year |
|---|---|
| 68,580 | 2021 |
| 67,553 | 2020 |
| 66,466 | 2019 |
| 44,894 | 2010 |
| 34,733 | 2000 |
| 28,738 | 1990 |
| 23,420 | 1980 |
| 18,860 | 1970 |
| 12,713 | 1960 |
| 9,980 | 1950 |
| 6,006 | 1940 |
| 5,134 | 1930 |
| 4,527 | 1920 |
| 4,071 | 1910 |
| 2,292 | 1900 |
| 2,335 | 1890 |
| 1,232 | 1880 |
| 741 | 1870 |