Waterloo city, Iowa
Official LSAD Designation: Waterloo city • Census GEOID: 1982425
• Black Hawk County
Demographics & Population Profile
Population and demographics for Waterloo city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 66,919 | — | 2025 | Census |
| Median Age | 36.7 yrs | ±0.8 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 29,283 | ±567 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).