skip to main content
The County of DuPage
Wheaton, Illinois

Internal Audit Reports

One of the duties of the County Auditor is to perform internal audits of County departments under the jurisdiction of the DuPage County Board and eight County-wide Elected Officials, in order to identify weaknesses in the control over County resources and to help the departments provide DuPage County taxpayers with better services at lower cost. A report of each audit, detailing the conditions found and the Auditor's recommendations for improvements, is distributed to the management of the department and to the County Board or Elected Official. Many of these reports are available to the public.

The County Auditor recognizes that it is a difficult balance between providing transparency to the public through internal audit reports and providing insight to those interested in exploiting the County's vulnerabilities for their personal benefit. As some audit reports identify internal control weaknesses within County operations, audit reports may not be immediately released to the public until the issues have been addressed.  Additionally, the audit reports listed on this website do not contain attachments and addendums having detailed information regarding County operations or that could disclose personally identifiable information about County employees.  The audit reports which have been released are also available for viewing within the County Auditor's Office during normal business hours.

At the time the County's new financial system was implemented in 2014, the County Auditor initiated an audit tracking system which assigned numbers at the commencement of audit procedures.  In some cases, for a variety of reasons, these audit procedures may not result in an audit report being issued resulting in gaps in the audit numbers noted in the reports.

The following is a list of audit reports released by the DuPage County Auditor since April 2004 in Adobe format. You must have the Adobe Acrobat Reader installed on your computer to view these reports. The Adobe Acrobat Reader is free, and may be obtained from Adobe Systems, Incorporated. You can receive a copy of any audit report issued prior to 2004 by sending an e-mail to, by calling 630-407-6075, or by writing to:

Office of the DuPage County Auditor
421 North County Farm Road
Wheaton, IL 60187

Link Acrobat Reader

Audit Reports


If you suspect fraud, waste or abuse, call the Audit Hotline at 630-75-AUDIT (630-752-8348),