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DeKalb County is a county located in the state of Illinois. Based on the 2010 census, the
population was 105,160. DeKalb county was
created on March 4, 1837. The county seat is
Sycamore. The county is named for Johann de Kalb
(1721-1780), German soldier in the Continental Army who fought alongside
Gilbert du Motier, marquis de Lafayette.
DeKalb County is part of the Chicago-Naperville-Elgin, IL-IN-WI Metropolitan Statistical Area.
The county is named for Johann DeKalb, a German baron, who served in the Colonies during the Revolution, and was mortally wounded at Camden, South Carolina in 1780.
County QuickFacts: CensusBureau Quick Facts
DeKalb County was created on March 4, 1837 (Laws, 1837, p. 97) and was formed from Kane County. Present area, or
parts of it, formerly included in: Kane County (1836-1837), LaSalle County (1831-1835), Putnam County (1825-1831),
Fulton County (1823-1825), Pike County (1821-1823), Clark County (1819-1821), Crawford County (1816-1819), Edwards
County (1815-1816), Madison County (1812-1815) and St. Clair County (1795-1812).
The County was named for Johann de Kalb, a German baron, who served in the Colonies during the Revolution, and was mortally wounded at Camden, South Carolina in 1780. The County Seat is Sycamore . Prior County Seats was Orange- Name later changed to Sycamore (1837-1839), Coltonville (1839-1840) and Sycamore (1840-Present).
As reported by the Census Bureau, the county has a total area of 635 square miles (1,645 km2), of which 634 square miles (1,642 km2) is land and 1 square mile (2 km2) (0.13%) is water.
DeKalb county is located in north Illinois. Kishwaukee River State
Fish and Wildlife Area and Shabbona Lake State Park are found in this
Bordering counties are as follows: