Sycamore city, Illinois
Official LSAD Designation: Sycamore city • Census GEOID: 1774223
• DeKalb County
Demographics & Population Profile
Population and demographics for Sycamore city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 19,083 | — | 2025 | Census |
| Median Age | 36.1 yrs | ±2.1 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 7,401 | ±355 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).