Groton city, South Dakota
Official LSAD Designation: Groton city • Census GEOID: 4626340
• Brown County
Demographics & Population Profile
Population and demographics for Groton city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 1,337 | — | 2025 | Census |
| Median Age | 33.9 yrs | ±4.2 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 625 | ±121 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).