Assessment Office:


Chief County Assessment Office

From Your Chief County Assessor

Our Mission Statement: To provide fair, accurate, and equitable assessments to all property owners in Rock Island County

To All Rock Island County Taxpayers:

We have compiled a report of statistical information regarding the Assessment Office and Board of Review. Click here PDF Document to view the 2018 Annual Report.

Your township assessor is currently reviewing assessments for the 2020 year, which will be payable in 2021. If you would like to have your assessment reviewed, feel free to contact your  township assessor.

Assessments are determined by your township assessor for a four year period. The four year period we are currently in started with the 2019 assessment year and will continue through the 2022 assessment year.

In the first year of the general assessment period, which was 2019, the Illinois Property Tax Code ExternalLink.gif directs the township assessor "in person or by deputy (to) actually view and determine as near as practicable the value of each property listed for taxation as of January 1 of that year...."

The Property Tax Code informs assessment officials that the property record system shall include up-to-date and complete tax maps, ownership lists, valuation standards (calculation used to value your property) and property record cards, including appraisals, for all or any part of the property in the township. The township assessor maintains property record cards and are available by contacting your township assessor. These records are public records, and shall be available for public inspection during business hours, subject to reasonable rules and regulations of the custodian of the records.

In early fall, we will be mailing a notice of assessments to all taxpayers who receive a change in their 2020 assessment. This notice will provide you with your total assessment as well as what homestead exemptions you are currently receiving. This information will also be available on our website at

These assessment changes will also be published in the Dispatch/Argus newspaper at the time of our mailing the assessment notice.

Should you have any questions about the assessment process, feel free to contact me.

FOIA Policy PDF Document


Larry A. Wilson
Chief County Assessor

Chief County Assessor/Board of Review - Announcements

Board of Review Now Accepting Complaints
The Board of Review is now accepting assessment complaints through December 21, 2020. Learn More . . .
Publication Listing
November 21, 2020: The Chief County Assessment Office (CCAO) has published the 2020 assessed values for Rock Island County in the Dispatch and the Rock Island Argus on Saturday, November 21, 2020. The listing is also available on this website. The last day to appeal to the Board of Review will be Monday, December 21, 2020. Click here to go to the 2020 Assessment Changes page of our site.
Public Health Notice from the Chief County Assessment Office
In-person Services Temporarily Suspended Beginning November 9, 2020. Click here for details....
Tax Bill Frequently Asked Questions
Do you have questions regarding your tax bill? Click here PDF Document to view our tax bill frequently asked questions.
Special Statement from the Chief County Assessment Official Regarding the Renewal of Certain Homestead Exemptions
Wednesday, June 10, 2020. Due to the health concerns of senior citizens and individuals with disabilities as it relates to COVID-19, on Friday, June 5th, Governor Pritzker signed Senate Bill 685 into law (Public Act 101-635). Learn More...

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Larry A. Wilson - Chief County Assessor Click to send e-mail 
Rock Island County Office Building (map ExternalLink.gif)
Second Floor - 1504 Third Avenue, Rock Island IL, 61201-8624

Phone: (309) 558-3660     Fax: (309) 558-3658     Hours: 8:00 AM to 4:30 PM - Monday thru Friday