Supervisor of Assessments

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Current News: 

• The 2021 Winnebago County Assessment Publication List can be found here.
• The 2021 Winnebago County Equalization Factors can be found here.
• The 2021 Winnebago County Board of Review Rules and Procedures can be found here.
• The 2021 Winnebago County Board of Review Complaint Form can be found here.

All exemption applications can be returned by mail to our office at:

Supervisor of Assessments

404 Elm St. Room #301

Rockford, IL 61101

Contact Us: 

Our office is currently open to the public; however, when possible we strongly encourage the public to call our office for assistance and submit forms by mail.  If coming into the office is necessary, those individuals who are not vaccinated are required to wear a face mask.

Office Hours: Monday through Friday 8:00am - 5:00pm (closed 2021 holidays)

Customer Survey

We look forward to hearing your feedback about your experience with our office and on our website so we can better serve taxpayers.  Please fill out this survey and return it to our office by email or postal mail.

Additional Pages:

• Supervisor of Assessments Home Page
• About Us
• 2021 Publication List
• Township Assessor Contact Information
• Exemption Forms & Information
• Board of Review
• Parcel Information Search
• WinGIS (Parcel Map)
• Equalization
• Winnebago County Sales
• General Information
• Transparency Information
• Waste-Fraud-Abuse Hotline
• FOIA
• FAQs