Walnut Creek city, California
Official LSAD Designation: Walnut Creek city • Census GEOID: 0683346
• Contra Costa County
Demographics & Population Profile
Population and demographics for Walnut Creek city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 70,012 | — | 2025 | Census |
| Median Age | 46.8 yrs | ±1.4 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 33,072 | ±781 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).