Watertown city, South Dakota
Official LSAD Designation: Watertown city • Census GEOID: 4669300
• Codington County
Demographics & Population Profile
Population and demographics for Watertown city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 23,736 | — | 2025 | Census |
| Median Age | 39.5 yrs | ±1.1 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 10,394 | ±272 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).