These Data Dashboards are created and published by the Cook County Assessor's Office to allow public access to our data summaries and analyses.
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Assessed Values by Township, 2019-2025
This dashboard allows the public to view assessed values for Cook County townships at each stage of the assessment process. The dashboard demonstrates changes in total assessed values at each stage of the assessment process since last year.
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Assessed Values by Municipality, 2019-2025
This dashboard allows the public to view assessed values for Cook County municipalities at each stage of the assessment process. The dashboard demonstrates changes in total assessed values at each stage of the assessment process since last year.
Cook County Housing Market Tracker
The Housing Market Tracker is a new, first-of-its-kind map from the Assessor's Office that shows real estate market trends and individual sales in Chicago's community areas and Cook County municipalities.
Historical Analysis of Property Tax Spikes
This data dashboard explores the number of homeowners in Cook County that experienced property tax bill spikes between Tax Year 2021 and Tax Year 2023.
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Affordable Housing Data Map
The AHSAP dashboard shows the locations and details on properties in the Affordable Housing Special Assessment Program (AHSAP) are located.