Cortland town, Illinois
Official LSAD Designation: Cortland town • Census GEOID: 1716470
• DeKalb County
Demographics & Population Profile
Population and demographics for Cortland town.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 4,676 | — | 2025 | Census |
| Median Age | 31.5 yrs | ±3.4 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 1,558 | ±134 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).