LaSalle County Courthouse

LaSalle County Governmental Center

Addresses for County Courthouse and IRAD:

Established:			January 15, 1831 (Laws, 1831, p. 54)
Origin of the name of the county:
	Named for Robert de LaSalle, the French explorer who effected the first white settlements in Illinois and explored the Mississippi to the Gulf.
Present area, or parts of it, formerly included in:
	North of Illinois River
		1825–1831	Putnam
		1823–1825	Fulton
		1821–1823	Pike
	South of Illinois River
		1827–1831	Tazewell
		1821–1827	Fayette
	1819–1821		Clark
	1816–1819		Crawford
	1815–1816		Edwards
	1812–1815		Madison
	1801–1812		St. Clair
	1790–1801		Knox, Northwest Territory
County Seat:
	1831–		Ottawa
History of county governing board:
	1831–1850		County Commissioners’ Court
	1850–		County Board of Supervisors
Township Government
	Adopted:		November 6, 1849
Township Names:
	Adams
	Allen		Formed from Bruce (date unknown).
	Brookfield
	Bruce
	Dayton
	Deer Park
	Dimmick
	Eagle
	Earl
	Eden
	Fall River		Formed from Grand Rapids (date unknown).
	Farm Ridge
	Freedom
	Grand Rapids
	Groveland		Formed from Eagle (date unknown; before September, 1856).
	Hope
	LaSalle		Formed from Peru (date unknown).
	Manlius
	Mendota		Formed from Meriden in February, 1856.
	Meriden
	Miller		Formed from Manlius and Mission (date unknown).
	Mission
	Northville
	Ophir		Name changed from Fremont in May, 1850.
	Osage		Formed from Eagle (date unknown, before September, 1856).
	Ottawa
	Otter Creek		Formed from Bruce (date unknown).
	Peru		Name changed from Salisbury September 27, 1856.
	Richland		Formed from Bruce (date unknown).
	Rutland		Name changed from Trenton in May, 1850.
	Serena		Name changed from Warren in May, 1850
	South Ottawa
	Troy Grove
	Utica
	Vermilion
	Wallace		Formed from Dayton (date unknown).
	Waltham