The County Auditor performs internal audits of the operations and finances of all officers, divisions, and departments under the jurisdiction of the DuPage County Board and the eight County-wide Elected Officials. These audits evaluate operations and finances and can assess weaknesses in County operations to help provide DuPage County taxpayers better services at lower cost. An audit report is provided to the management of the division or department, or to the Elected Official, to describe the conditions found and if appropriate, recommendations are made to correct weaknesses or vulnerabilities and to suggest improvements. When appropriate, these reports are also provided to the County Board and senior staff of the County.
Links to most internal audit reports can be found on this page, however some reports are not published, or have portions redacted, to protect an individual's privacy, to safeguard ongoing investigations or to avoid disclosing weaknesses that can be exploited by hackers and other bad actors, to the detriment of the County. Other similar reasons may apply in certain circumstances.
The internal audit reports below are presented in a rolling twelve-month period and are at least six months old at the time they are published online. Audit reports less than six months old are not published in order to afford the auditee an opportunity to address any issues identified in the audit. Typically, this page is updated monthly; with the addition of newer reports and removal of older reports. Reports are archived after they have been published for a one-year period. Archived reports remain available online - Archived Audit Reports.

Document Center
The Document Center provides easy access to public documents. Click on one of the categories below to see related documents or use the search function.
Documents sorted by SEQ in Ascending Order within category
Fiscal Year 2021 Audit Reports32 documents
- Erroneous Invoice Payment - County Sheriff and County Auditor; Issued 12/3/2021
- ETSB Accounts Payable Audit for the 12/8/2021 Board meeting; Issued 11/30/2021
- Retention Benefits Internal Audit-PPE 11/26/2021; Issued 11/30/2021
- Retention Benefits Internal Audit-PPE 11/12/2021; Issued 11/16/2021
- Retention Benefits Internal Audit-PPE 10/29/2021; Issued 11/1/2021
- ETSB Accounts Payable Audit for the 11/10/2021 Board meeting; Issued 11/1/2021
- Retention Benefits Internal Audit-PPE 10/15/2021; Issued 10/20/2021
- Retention Benefits Internal Audit-PPE 10/1/2021; Issued 10/6/2021
- Payment of Duplicate Invoices-DOT and Probation; Issued 10/5/2021
- ETSB Accounts Payable Audit for the 10/13/2021 Board meeting; Issued 10/5/2021
- Choose DuPage Reinvest DuPage Small business Grant Program Audit; Issued 9/28/2021
- Retention Benefits Internal Audit-PPE 9/17/2021; Issued 9/22/2021
- Entry of Duplicate Invoices-Circuit Court Clerk; Issued 9/21/2021
- Retention Benefits Internal Audit-PPE 9/3/2021; Issued 9/8/2021
- ETSB Accounts Payable Audit for the 9/8/2021 Board meeting; Issued 8/31/2021
- Retention Benefits Internal Audit-PPE 8/20/2021; Issued 8/31/2021
- Retention Benefits Internal Audit-PPE 8/6/2021; Issued 8/20/2021
- ETSB Accounts Payable Audit for the 8/11/2021 Board Meeting; Issued 8/3/2021
- Retention Benefits Internal Audit-PPE 7/23/2021; Issued 7/30/2021
- Retention Benefits Internal Audit-PPE 7/9/2021; Issued 7/15/2021
- Retention Benefits Internal Audit-PPE 6/25/2021; Issued 7/1/2021
- ETSB Accounts Payable Audit for the 7/14/2021 Board Meeting; Issued 6/30/2021
- Retention Benefits Internal Audit-PPE 6/11/2021; Issued 6/17/2021
- ETSB Accounts Payable Audit for the 6/9/2021 Board Meeting-Supplemental; Issued 6/7/2021
- DSSA Bank Reconciliation Audit-March 2021; Issued 6/2/2021
- WIOA Bank Reconciliation Audit-March 2021; Issued 6/2/2021
- Retention Benefits Internal Audit-PPE 5/28/2021; Issued 6/2/2021
- ETSB Accounts Payable Audit for the 6/9/2021 Board Meeting; Issued 6/1/2021
- WIOA Bank Reconciliation Audit-February 2021; Issued 5/28/2021
- DSSA Bank Reconciliation Audit-February 2021; Issued 5/28/2021
- Retention Benefits Internal Audit-PPE 5/14/2021; Issued 5/20/2021
- Retention Benefits Internal Audit-PPE 4/30/2021; Issued 5/5/2021
Fiscal Year 2022 Audit Reports28 documents
- Retention Benefits Internal Audit-PPE 5/13/2022; Issued 5/24/2022
- Retention Benefits Internal Audit-PPE 4/29/2022; Issued 5/5/2022
- ETSB Accounts Payable Audit for the 5/11/2022 Board meeting; Issued 5/4/2022
- Retention Benefits Internal Audit-PPE 4/15/2022; Issued 4/20/2022
- Retention Benefits Internal Audit-PPE 4/1/2022; Issued 4/7/2022
- ETSB Accounts Payable Audit for the 4/13/2022 Board meeting; Issued 4/4/2022
- Retention Benefits Internal Audit-PPE 3/18/2022; Issued 3/24/2022
- Retention Benefits Internal Audit-PPE 2/18/2022; Issued 3/17/2022
- Retention Benefits Internal Audit-PPE 3/4/2022; Issued 3/9/2022
- ETSB Accounts Payable Audit for the 3/9/2022 Board meeting; Issued 3/1/2022
- Payment of Duplicate Invoices-Probation & ARPA; Issued 2/14/2022
- Retention Benefits Internal Audit-PPE 2/4/2022; Issued 2/11/2022
- Retention Benefits Internal Audit-PPE 1/7/2022; Issued 2/8/2022
- Payment of Duplicate Invoices-Care Center & ARPA; Issued 2/2/2022
- ETSB Accounts Payable Audit for the 2/9/2022 Board meeting; Issued 2/2/2022
- Retention Benefits Internal Audit-PPE 1/21/2022; Issued 1/27/2022
- Retention Benefits Internal Audit-PPE 12/24/2021; Issued 1/12/2022
- ETSB Accounts Payable Audit for the 1/12/2022 Board meeting; Issued 1/4/2022
- Retention Benefits Internal Audit-PPE 12/10/2021; Issued 1/3/2022
- Entry of Duplicate Invoices - Stormwater Management; Issued 6/29/2022
- Retention Benefits Internal Audit-PPE 6/10/2022; Issued 6/22/2022
- ETSB Accounts Payable Audit for the 6/8/2022 Board Meeting; Issued 6/1/2022
- Retention Benefits Internal Audit-PPE 5/27/2022; Issued 6/1/2022
- Sheriff's Commissary Account Internal Audit FY2020-2021 - Final Response; Issued 5/31/2022
- ETSB Accounts Payable Audit for the 7/13/2022 Board Meeting; Issued 7/5/2022
- Retention Benefits Internal Audit-PPE 7/8/2022; Issued 7/12/2022
- Retention Benefits Internal Audit-PPE 6/24/2022; Issued 7/6/2022
- Retention Benefits Internal Audit-PPE 7/22/2022; Issued 7/28/2022