Millbrae city, California
Official LSAD Designation: Millbrae city • Census GEOID: 0647486
• San Mateo County
Demographics & Population Profile
Population and demographics for Millbrae city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 22,869 | — | 2025 | Census |
| Median Age | 43.7 yrs | ±1.8 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 8,121 | ±332 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).