Onida city, South Dakota
Official LSAD Designation: Onida city • Census GEOID: 4647180
• Sully County
Demographics & Population Profile
Population and demographics for Onida city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 640 | — | 2025 | Census |
| Median Age | 42.2 yrs | ±10.3 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 292 | ±44 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).