The Cook County Assessor’s Office will be closed on Monday, February 18th, 2019 due to the Presidents‘ Day holiday.
We will re-open during regular business hours on Tuesday, February 19th.


Due to inclement weather, the 1/31 deadline for annual affidavits for exempt or incentive properties has been extended to February 6th, 2019.

The deadlines for the Senior Citizen and Senior Freeze Exemption applications for Tax Year 2018 have been extended to Friday, February 15th, 2019.

As a reminder, any exemptions filed for the 2018 tax year will appear on the 2nd installment bill which will be mailed in July of 2019.
Read more in our News section.

Cook County Assessor Fritz Kaegi releases update on the office’s first 100 days

Read the press release in our News section.
To read the report on Medium, click here.

Important Notices

Maps showing reductions in assessed value due to the impact of airport noise on home prices in Norwood Park, Leyden, Maine and Jefferson Townships

Tax Bills and Payments

The Cook County Treasurer’s Office mails out tax bills and collects payments.
For a copy of your bill and/or payment information, please contact the Cook County Treasurer's Office at 312-443-5100,
or visit their Web site at

Report Erroneous Exemptions

When a property is getting an erroneous exemption you are paying more than your fair share. You can anonymously report erroneous exemptions at .


Click here if you have a question, would like to send us an email or to receive emails regarding mailing dates, deadlines and assessment information.