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LaSalle County
Contact InformationCounty Clerk or Recorder
LaSalle County Governmental Center
707 Etna Rd.
Ottawa, IL 61350
815-434-8202 – County Clerk
815-434-8226 – Recorder
Circuit Clerk
LaSalle County Courthouse
119 W. Madison St.
Ottawa, Illinois 61350
815-434-8271
IRAD Depository
Founders Memorial Library
Rm. 245B
Northern Illinois University
DeKalb, IL 60115
815-753-1807
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 Seats
- 1831–present – Ottawa
History of county governing board
- 1831–1850 – County Commissioners’ Court
- 1850–present – 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
Township Map
Pertinent Databases