Sidney city, Montana
Official LSAD Designation: Sidney city • Census GEOID: 3067900
• Richland County
Demographics & Population Profile
Population and demographics for Sidney city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 6,217 | — | 2025 | Census |
| Median Age | 37.3 yrs | ±3.1 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 2,505 | ±214 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).