ILLINOIS STATE ARCHIVES

IRAD Home  |  Administrative Histories / Record Descriptions  |  Local Government Records Database  |  Quick Links  |  Regional Map and Contact Information  |  Research Policy

LaSalle County

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
1790–180 — Knox, Northwest Territory

County Seats
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

Township Map

Pertinent Databases
Federal Township Plats of Illinois
Illinois Public Domain Land Tract Sales Database
Illinois Statewide Death Index, 1916–1950
Illinois Statewide Marriage Index
Local Governmental Records Database
Name Index to Illinois Local Governments