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The County of DuPage
Wheaton, Illinois
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County Auditor: Bob Grogan, CPA, CFE

Bob Grogran AuditorAs the County's only independently elected officer responsible for evaluating and reporting on County operations, the County Auditor conducts internal audits of the operating departments, systems and internal controls in County government.

The County Auditor audits operations under the jurisdiction of the DuPage County Board and eight County-wide Elected Officials. The Auditor evaluates how County resources/assets are protected, used and recorded; how and where County money is spent; and how County departments are operating. The Auditor prepares recommendations for improving systems and processes. You may use the County Auditor’s Audit Hotline to report any issues about these agencies.

When the County Auditor receives information regarding observations of waste, fraud and misuse of resources related to County operations and programs, audit procedures are performed relative to these allegations. When deemed appropriate, the results of such audit procedures are presented to the State's Attorney for further investigation.

The County Auditor does not have the statutory authority to audit the following entities which are governed by separate boards: DuPage Airport Authority, DuPage Forest Preserve, DuPage Health Department, DuPage Housing Authority, and DuPage Water Commission.  These agencies should be contacted directly if there are any questions and/or concerns over their operations.

County Auditor Grogan is an advocate of government transparency and access to information. The County Auditor's website is designed to assist citizens in obtaining usable information about DuPage County operations. Outside entities recognized the County Auditor's efforts in enhancing the transparency of government and awarded DuPage County a perfect score as one of the best local government websites in America for providing transparency in government.

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Contact Us


Audit Hotline:


Office Hours:
8 a.m. - 4:30 p.m.

Jack T. Knuepfer Bldg
421 N. County Farm Road
Wheaton, IL 60187


Audit Hotline

If you suspect fraud, waste or abuse,