San Carlos city, California
Official LSAD Designation: San Carlos city • Census GEOID: 0665070
• San Mateo County
Demographics & Population Profile
Population and demographics for San Carlos city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 29,261 | — | 2025 | Census |
| Median Age | 41.7 yrs | ±1.6 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 11,001 | ±302 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).