Winnebago County
Winnebago County Seal

Supervisor of Assessments

Our mission: Serve Taxpayers, Township Assessors and the Board of Review in a 

professional, helpful and friendly manner while ensuring the timely and accurate             

processing of assessments, exemptions and tax maps.


New! Information about Assessment Appeals, Exemptions and Tax Rates (pdf version)




Monday, November 27, 2017

Harlem, Rockton, Roscoe and Owen Townships

Room 301

Tuesday, November 28, 2017

Rockford and Cherry Valley Townships

Room 301

Wednesday, November 29, 2017

Rockford Township

Room 301

Thursday, November 30, 2017

Rockford Township

Room 301

Friday, December 1, 2017

Deliberations - AGENDA

Room 301



                           *AMENDED 10-04-2017*

       Adding language for Representation at Hearings


Brochure 1

This brochure is available in the Supervisor of Assessments Office


The following are the townships, date of publication and newspaper in which they are being published.  Click on the township for the list of parcels being published.  Only those parcels that had changes by the Township Assessor will be published. Click here to see individual township equalization factors: 2017 Equalization Factors

Cherry Valley, Rockford and Owen Townships, Wednesday, July 19, 2017 in the Rockford Register Star

Durand/Laona Multi-Township, Wednesday, July 19, 2017 in the Volunteer

Harlem Township, Thursday, July 20, 2017 in the Post Journal

Rockton, Roscoe and Shirland Townships, Thursday, July 20, 2017 in the North Suburban Herald

Burritt/Harrison Multi-Township, Pecatonica/Seward Multi-Township and Winnebago Township, Thursday, July 20, 2017 in the News Gazette



UPDATED FILL-IN FORM! General Homestead Exemption Application 


Please take a few moments to complete a survey so that we may better serve our taxpayers!  You may either fill it in, print and send by U.S. Mail or click "send by email" at the bottom of the survey.




 A Brochure with information regarding distress sales is available in the Supervisor of Assessments Office and at the link below:

What Taxpayers Should Know About Distress Sales


The 2017 Instructional Information for Township Assessors is now available to the general public.

The Winnebago County Supervisor of Assessments is required to assemble all Township Assessors annually and instruct them in uniformity of their functions.  The meeting for 2016 assessments was held on December 18, 2015.  The information presented at the meeting also needs to be made available to the general public.  We are making it available by posting it on our website.  This information should serve to keep the taxpaying public better informed and demonstrate our commitment to openness and transparency.

Select "Homestead Exemption Information" on the right and select the "2017 Rental/Owner Occupancy Exemption Application" form from the drop-down.  Print the form for completion.  The application and a copy of the lease verifying occupancy on January 1, 2017 by the tenant listed on the application are required to qualify for the exemption.  The application and lease are due before April 1, 2017.  


WINGIS Single Family Sales Locator Tool - Now Available!

Select "WINGIS" on the right.
The "Sales Locator" tool link is located at the top of the main WINGIS page under Maps. 


Winnebago County covers 520 Square Miles and has a population of 295,266 (2010) with 122,144 taxable parcels.

The Supervisor of Assessments Office is responsible for the publication and mailing of Assessment Change Notices on all taxable parcels.  The Office also maintains all records for Homestead Exemptions.  They assist taxpayers with the filing of property tax exemptions and any questions they may have in understanding the assessment process for their property.

The Supervisor of Assessments Office also assists Township Assessors in the performance of their duties, as well assisting the Board of Review in completing their responsibilities to maintain a timely tax cycle.  

Thomas J. Walsh, Supervisor of Assessments: 

Contact Us

404 ELM ST  RM 301
Phone: 815-319-4460
Fax: 815-319-4461
The Supervisor of Assessments office is open Monday through Friday from 8:00 a.m. to 5:00 p.m.

Waste-Fraud-Abuse Hotlineclick here


Winnebago County
404 Elm Street
Rockford, IL 61101
OFC: (815) 319-4444

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