North Sioux City city, South Dakota
Official LSAD Designation: North Sioux City city • Census GEOID: 4645700
• Union County
Demographics & Population Profile
Population and demographics for North Sioux City city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 3,036 | — | 2025 | Census |
| Median Age | 36.6 yrs | ±8.7 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 1,591 | ±136 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).