The Office of the County Auditor was established by an act of the Illinois General Assembly in 1911, and except for Cook County, Illinois' largest counties have an elected County Auditor. The County Auditor is elected for a 4-year term, in the same general election as the President of the United States. DuPage County elected its first County Auditor in 1932, when the county's population reached 75,000. Since then, six persons have served as County Auditor. The current County Auditor, Bob Grogan, has held the office since December 1, 2008.

Past DuPage County Auditors
Jim Rasins County Auditor 2000 - 2008	William T. Jacklin County Auditor 1973 - 2000	Henry C. Cheney County Auditor 1972 - 1973
Leo D. La Fleur County Auditor 1960 - 1972	Robert D. Bradlee County Auditor 1932 - 1960