Community Data

The Cook County Assessor’s Office is committed to sharing data about your community. You can find our data releases here, as well as tools you can use to better understand property assessments and their role in Cook County’s property tax system.

Assessment Data

Assessment Data

You can download the characteristics data used to estimate the values of Cook County homes. 

Expert and Fair Valuation

Expert and Fair Valuation

We combine our analysts' expertise with state-of-the-art methods in statistics and data science.