Sycamore is the county seat for DeKalb County
Adjacent to DeKalb County, Illinois
Boone County (5) ► Kane County (52) ► Kendall County (5) ► LaSalle County (97) ► Lee County (52) ► McHenry County (38) ► Ogle County (44) ► Winnebago County (6) ►
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| Near West Lincoln Highway (Illinois Route 38) east of West Locust Street, on the left when traveling east. |
| On Crego Road, 1 mile south of Perry Road (County Road 7), on the left when traveling north. |
| Near Sycamore Road (Illinois Route 23) 0.1 miles north of Gateway Drive, on the right when traveling north. |
| On Roberts Lane south of Roberts Circle, on the right when traveling south. |
| On Oak Street west of North 4th Street, on the right when traveling west. |
| On West Lincoln Highway (Illinois Route 38) east of Castle Drive, on the right when traveling west. |
| On North 4th Street north of Lincoln Highway (Illinois Route 38), on the right when traveling north. |
| On West Roosevelt Street just west of Hickory Street, on the left when traveling west. |
| Near Bethany Road east of Sycamore Street (Illinois Route 23), on the right when traveling east. |
| Near Malta Road (County Highway 31) 0.1 miles north of Lincoln Highway (State Route 38), on the left when traveling north. |
| Near Malta Road (County Highway 31) 0.1 miles north of Lincoln Highway (State Route 38), on the left when traveling north. |
| Near Malta Road (County Highway 31) 0.1 miles north of Lincoln Highway (State Route 38), on the left when traveling north. |
| Near Malta Road (County Highway 31) 0.1 miles north of Lincoln Highway (State Route 38), on the left when traveling north. |
| On Jefferson Street at North 3rd Street, on the left when traveling west on Jefferson Street. |
| Near Malta Road (County Highway 31) 0.1 miles north of Lincoln Highway (State Route 38), on the left when traveling north. |
| Near Chief Shabbona County Forest Preserve, 0.5 miles south of Preserve Road. |
| On East Comanche Avenue (Illinois Route 30) at Indian Road, on the right when traveling east on East Comanche Avenue. |
| On Dekalb Avenue at South Sacramento Street, on the right when traveling west on Dekalb Avenue. |
| Near West Prairie Drive east of Peace Road, on the right when traveling east. |
| Near Aberdeen Court, 0.1 miles south of Bethany Road, on the right when traveling south. |