San Anselmo town, California
Official LSAD Designation: San Anselmo town • Census GEOID: 0664434
• Marin County
Demographics & Population Profile
Population and demographics for San Anselmo town.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 12,555 | — | 2025 | Census |
| Median Age | 45.6 yrs | ±3.3 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 5,224 | ±296 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).