Mill Valley city, California
Official LSAD Designation: Mill Valley city • Census GEOID: 0647710
• Marin County
Demographics & Population Profile
Population and demographics for Mill Valley city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 13,799 | — | 2025 | Census |
| Median Age | 48.7 yrs | ±2.8 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 5,688 | ±289 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).