The Assessor’s Office Website will be unavailable due to an internet outage this Saturday, January 21st, from 5:00 p.m. to 11:00 p.m. The Cook County Bureau of Technology will be performing maintenance on the network for County offices.

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.