Colby city, Kansas
Official LSAD Designation: Colby city • Census GEOID: 2014650
• Thomas County
Demographics & Population Profile
Population and demographics for Colby city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 5,489 | — | 2025 | Census |
| Median Age | 32.3 yrs | ±1 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 2,131 | ±171 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).