| Place Name | San Marcos |
| Place Type | City |
| ZIP Code(s) | 92069 92078 92096 |
| County | San Diego County |
| Area Code(s) | 442,760 |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2022) | 83,028 |
| Population Growth Rate (2010-19) | 13.19% |
| Majority Ethnicity | White 55.19% |
| Metro/Micro Stats Area | San Diego-Chula Vista-Carlsbad, CA |
| US Congressional District(s) | California 50th |
| State Assembly Districts | 75 |
| State Senate Districts | 38 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 55.19% |
| African American | 1.43% |
| Hispanic | 0.88% |
| Asian | 8.99% |
| Native American | 0.01% |
| Hawaiin/Pacific Islander | 33.5% |