Cook County, Illinois

Cook County Property Taxes

Property taxes in Cook County are proportional to assessed property values. Therefore, a higher assessed property value means a higher tax bill. In an effort to estimate fair market prices, the Assessor re-estimates a property's value once every 3 years (each year 1/3 of Cook County properties are reassessed).

By law, the assessed value of every property in Cook County may be appealed each year even though the Assessor re-values only 1/3 of them.

If a property's assessed value is successfully appealed during a reassessment year, this means that the property owner will save money for 3 straight years.

Townships

Cook County has 38 townships. Property taxes can be appealed only during specific times:

Township Appeals Opened Appeals Closed
River Forest 4/21/2021 5/21/2021
Riverside 4/22/2021 5/22/2021
Evanston 5/7/2021 6/7/2021
Oak Park 5/17/2021 6/16/2021
Norwood Park 5/17/2021 6/16/2021
Berwyn 6/01/2021 7/01/2021
New Trier 6/01/2021 7/01/2021
Cicero 6/08/2021 7/09/2021
Rogers Park 6/11/2021 7/13/2021
Palatine 6/14/2021 7/16/2021
Schaumburg 6/16/2021 7/19/2021
Elk Grove 6/28/2021 7/29/2021
Calumet 7/02/2021 8/03/2021
Orland 7/02/2021 8/03/2021
Hanover 7/14/2021 8/16/2021
Barrington 7/14/2021 8/16/2021
West Chicago 7/21/2021 8/23/2021
Bloom 7/23/2021 8/23/2021
Maine 7/23/2021 8/23/2021
Palos TBD TBD
Wheeling TBD TBD
Lemont TBD TBD
Worth TBD TBD
Leyden TBD TBD
Stickney TBD TBD
Lake View TBD TBD
Lyons TBD TBD
Hyde Park TBD TBD
Thornton TBD TBD
Jefferson TBD TBD
Proviso TBD TBD
Northfield TBD TBD
Bremen TBD TBD
Lake TBD TBD
Niles TBD TBD
Rich TBD TBD
North Chicago TBD TBD
South Chicago TBD TBD

Past Calendars