ILLINOIS STATE ARCHIVES

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

DuPage County

Established
February 9, 1839 (Laws, 1839, p. 73)

Origin of the name of the county
Named for a small river named DuPage which flows through the county and is said to have derived its name from a French trapper and trader of that region.

Present area, or parts of it, formerly included in
1831–1839 — Cook
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
1790–1801 — Knox, Northwest Territory

County Seats
1839–1867 — Naperville
1867–  — Wheaton

History of county governing board
1839–1850 — County Commissioners’ Court
1850–  — County Board of Supervisors

Township Government
Adopted — November 6, 1849

Township Names
Addison
Bloomingdale
Downers Grove
Lisle — Name changed from DuPage (date unknown).
Milton
Naperville
Wayne
Winfield
York

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