Winnebago County Courthouse

Winnebago County Administration Building

Addresses for County Courthouse and IRAD:

Established:					January 16, 1836 (Laws, 1836, p. 273)
Origin of the name of the county:
		Named for the Winnebago indian tribe who once occupied that part of northern Illinois. The indian word Winnebago translates to "fish eater."
Present area, or parts of it, formerly included in:
		Eastern Part:
			1831–1836		LaSalle
			1825–1831		Putnam
			1823–1825		Fulton
			1821–1823		Pike
			1819–1821		Clark
			1816–1819		Crawford
			1815–1816		Edwards
			1812–1815		Madison
			1801–1812		St. Clair
		Western Part:
			1827–1836		JoDaviess
			1825–1827		Putnam
			1823–1825		Fulton
			1821–1823		Pike
			1817–1821		Bond
			1812–1817		Madison
			1801–1812		St. Clair
County Seats:
		1836–1839			Winnebago—Temporary designation.
		1839–			Rockford
History of county governing board:
		1836–1850			County Commissioners’ Court
		1850–			County Board of Supervisors
Township Government
		Adopted:			November 6, 1849
Township Names:
	Burritt
	Cherry Valley			Name changed from New Milford circa 1869.
	Durand			Name changed from Howard circa 1869.
	Harlem
	Harrison
	Laona
	Owen
	Pecatonica			Name changed from Lysander (date unknown).
	Rockford
	Rockton
	Roscoe
	Seward
	Shirland
	Winnebago			Name changed from Elida circa 1869.