South Sioux City city, Nebraska
Official LSAD Designation: South Sioux City city • Census GEOID: 3146030
• Dakota County
Demographics & Population Profile
Population and demographics for South Sioux City city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 14,158 | — | 2025 | Census |
| Median Age | 30.5 yrs | ±1.1 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 4,766 | ±172 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).