San Dimas city, California
Official LSAD Designation: San Dimas city • Census GEOID: 0666070
• Los Angeles County
Demographics & Population Profile
Population and demographics for San Dimas city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 32,978 | — | 2025 | Census |
| Median Age | 43.3 yrs | ±2.4 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 12,071 | ±484 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).