Boulder city, Colorado
Official LSAD Designation: Boulder city • Census GEOID: 0807850
• Boulder County
Demographics & Population Profile
Population and demographics for Boulder city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 105,689 | — | 2025 | Census |
| Median Age | 28.8 yrs | ±0.6 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 44,432 | ±815 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).