Du Page County, Illinois
County: Du Page
Lat/Long: 41.8333, -88.0833
On February 9, 1839, the Illinois General Assembly created DuPage County out of Cook County. The General Assembly appointed commissioners to locate a seat of justice for the new county, and in June 1839 said commissioners selected Naperville. Naperville remained the county seat until 1867, when it moved to Wheaton.
An Act to Create the County of DuPage; Newton Bateman and Paul Selby, eds., Historical Encyclopedia of Illinois and History of DuPage County (Chicago, IL: Munsell, 1913), 2:640-41.