Cook County of Illinois
Organization Overview
- Type: County Government
- Total datasets: 472
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Datasets (472)
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Assessor [Archived 05-11-2022] - First Pass Values Views: 0
As of February 14, 2020 this dataset will be considered archived information and will no longer be updated. First-pass property values as assessed by the Cook County Assessor in their Computer Assisted Mass Appraisal system used to assess residential properties. This dataset contains first pass…
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Assessor [Archived 05-11-2022] - Property Locations Views: 0
This data set includes property locations and attached spatial data for all Cook County parcels. Spatial matching was based on parcel centroids. Older properties may be missing latitude and longitude data because they are not contained in the most recent parcel shape layer. Brand new properties…
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Assessor [Archived 05-11-2022] - Residential COVID Adjustment Replication Data Views: 0
In response to the 2020 COVID-19 pandemic and its anticipated effects on the residential real estate market, the Cook County Assessor will adjust residential assessments. This data can be used to replicate residential COVID adjustments. Code can be located on GitLab. See data notes for link. NOTE…
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Assessor [Archived 05-11-2022] - Residential Exemption Amounts Views: 0
This data displays total exempt EAV and total exemptions by tax code. Since residential exemptions reveal sensitive information about individual taxpayers and households, we have applied the p% statistical disclosure rule in suppressing fields.
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Assessor [Archived 05-11-2022] - Residential Modeling Characteristics (Chicago) Views: 0
This data set contains characteristic data points used by the Cook County Assessor in the 2021 Chicago reassessment to produce initial estimates of the current market value of most Chicago homes (single-family homes, small multi-family homes, and condo units). You can use the "Filter" option to…
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Assessor [Archived 05-11-2022] - Residential Neighborhood Boundaries Views: 0
Neighborhoods play an important role in residential property assessment. Single-family and residential multi-family property assessments are sensitive to neighborhood boundaries. Neighborhoods are nearly always used in statistical regression models to produce initial assessed values, and…
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Assessor [Archived 05-11-2022] - Residential Property Characteristics Views: 0
Assessment dataset used by the Cook County Assessor in their Computer Assisted Mass Appraisal (CAMA) system used to assess residential properties in Northern Triennial Townships. This dataset contains property information for every residential PIN in the northern triennial townships where class is…
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Assessor [Archived 05-11-2022] - Residential Sales Data Views: 0
This is the data set of residential sales used by the Cook County Assessor in their Computer Assisted Mass Appraisal system used to assess residential property values. This data set contains property information for every arm's-length residential sale in Cook County where class is within a…
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Assessor [Archived 05-11-2022] - Sales Views: 0
Real estate sales data used by the Cook County Assessor to estimate Fair Cash Values for the purpose of property taxation. Deeds that include multiple PIN numbers are excluded from this data. This data is produced by joining sales data from the Illinois Department of Revenue against incomplete…
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Assessor [Archived 05-18-2022] - Assessment Appeals by Town and Class - 2010 Views: 0
Assessment Appeals by Town and Class from Tax Year 2010.
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Assessor [Archived 05-18-2022] - Homeowner Exemptions, by Town Number/Township - 2010 Views: 0
Homeowner Exceptions by Town Number/Township in Tax Year 2010.
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Assessor [Archived 05-18-2022] - Residential Assessments Views: 0
This data contains every residential Property Index Number (PIN) and corresponding Assessed Values from significant stages in the assessment process. This data was replaced with the more comprehensive Cook County Assessor's Fair Cash Values.
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Assessor [Archived 05-31-2023] - Parcel Universe Views: 0
A complete, historic universe of Cook County parcels with attached geographic, governmental, and spatial data. When working with Parcel Index Numbers (PINs) make sure to zero-pad them to 14 digits. Some datasets may lose leading zeros for PINs when downloaded. Additional notes:<ul><li>Data is…
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Assessor - Parcel Proximity Views: 0
Cook County 10-digit parcels with attached distances to various spatial features. When working with 10-digit Parcel Index Numbers (PINs) make sure to zero-pad them to 10 digits. Some datasets may lose leading zeros for PINs when downloaded. 10-digit PINs do not identify individual condominium…
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Board of Commissioners Contingency Accounts Views: 0
Board member contingency funds forms submitted for reimbursement approval to the Ethics Department.
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Board of Ethics -- 2011 Monthly Board of Ethics Statistics Views: 0
Updated 11/1/2011. Monthly file that represents Ethics Statistics on Training Seminars, Employees Trained, Inquiries (Pre-Bid Meetings included), New Investigations, Advisory Opinions Issued, Vendor Compliance Audit, Lobbyist Expense Audit, and Pplitical Contributions Audit
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Board of Ethics - Summary of Activity, by Month - Fiscal Year 2011 Incomplete Views: 0
Data covers December 2010 through June 2011.
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Board of Review Views: 0
Board of Review District based on 2010 census.
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Board of Review - 2009 PIN information Views: 0
PIN information for 2009
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Board of Review - 2010 PIN information Views: 0
PIN information for 2010
