DeKalb County is a county located in the U.S. state of Illinois. As of the 2020 United States census, the population was 100,420. Its county seat is Sycamore.
DeKalb County Court House, Sycamore, Illinois
Sycamore is a city in DeKalb County, Illinois, United States. It has a commercial district based and centered on Illinois Route 64. The population was 18,577 at the 2020 census, up from 17,419 at the 2010 census. Sycamore is the county seat of DeKalb County and was named after the sycamore tree.
Downtown Sycamore, looking west from State Street and Main Street
The DeKalb County Courthouse lawn becomes a colorful display of pumpkins during the annual Sycamore Pumpkin Festival.
Elmwood Cemetery Gates (1865)
David DeGraff House (1867) in the Sycamore Historic District