Dedicated to maintaining and improving the quality of audit of Illinois county governments through continuing education.

Message from the President:

Shannon Teresi, McHenry County Auditor

Welcome to the Illinois Association of County Auditor’s (IACA) website.

IACA is an organization made up of County Auditors throughout the State of Illinois, which is dedicated to maintaining and improving the quality of auditing of county governments through education.

The purpose of the IACA is:

1. To provide a statewide organization through which membership may discuss the common problems and concerns of County Auditors.

2. To provide a means by which the membership may jointly co-operate with other organizations and individuals to improve accounting, auditing, and financial reporting for Illinois counties.

3. To provide a means by which the membership may cooperatively work with the Legislature to promote laws for the improvement of accounting, auditing, and financial reporting.

4. To provide continuing education for all members in accordance with the Illinois Compiled Statutes in order to maintain professional accounting practices.

5. To promote public awareness of with work conducted by Illinois County Auditors.


Our website is to provide access to information about the work of the County Auditors and to provide the links to each individual office (see tab entitled List of County Auditors).

This website not only serves the membership of the Illinois Association of County Auditors, comprised of the seventeen elected County Auditors, but also serves to reach out to other local government officials whom we serve with resource and contact information. Additionally, this also serves as a mechanism for the general public to gain a better understanding of our responsibilities, duties, and goals according to the Illinois County Auditor State Statutes.

There are a total of 102 counties within the State of Illinois. Illinois Compiled State Statutes, specifically 55 ILCS 5/3-1002, explains why there are only seventeen County Auditors at this point in time. The statutory reference in part, starts as follows: Auditors in counties of 75,000 to 3,000,000. In all counties containing less than 3,000,000 and over 75,000 inhabitants by the last federal census, there is created the office of county auditor, whose term of office shall be 4 years and until his successor is elected and qualified.

Most of the counties in Illinois, as per the 2010 federal census, fall below the 75,000 population threshold and are not required to establish the position of an elected County Auditor. However, the Illinois Association of County Auditors does make contact with counties approaching the population threshold in order to acquaint them with the benefits and advantages of having an auditing function within their county.

Please be sure to look through our entire website and check back as we will be updating the content of the important work done by the County Auditors of Illinois. Thank you for visiting our website and we hope that you have gained a better understanding of the value of our services to our respective counties.



These links to the following organizations serve to further enhance, educate, and provide important information to the Illinois Association of County Auditors.

Government Advisory Committee of IIA - Chicago Chapter :

Association of Local Governmental Auditors:

The Institute of Internal Auditors (IIA):

Government Finance Officers Association (GFOA):

Association of Certified Fraud Examiners:

Association of Government Accountants (AGA):

Government Accounting Standards Board (GASB):

GAO United States Government Accountability Office:

IACA is an affliate organization of the Illinois Association of County Officials (IACO)

To read the Illinois Compiled Statute for the duties of the county auditor, click on link below:

Illinois County Auditor Statute