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County
Assessor - Permits
Cook County of Illinois —
Historical permit data submitted by municipalities to the Cook County Assessor's Office. When working with Parcel Index Numbers (PINs) make sure to zero-pad them to... -
County
Assessor - Parcel Universe (Current Year Only)
Cook County of Illinois —
A current-year-only universe of Cook County parcels with attached geographic, governmental, and spatial data. When working with Parcel Index Numbers (PINs) make sure... -
County
Assessor - Parcel Sales
Cook County of Illinois —
Update 10/31/2023: Sales are no longer filtered out of this data set based on deed type, sale price, or recency of sale for a given PIN with the same price. If users... -
County
Assessor - Commercial Valuation Data
Cook County of Illinois —
Commercial valuation data collected and maintained by the Cook County Assessor's Office, from 2021 to present. The office uses this data primarily for valuation and... -
County
Assessor - Appeals
Cook County of Illinois —
Appeals for many years are currently missing from this dataset as we repopulate our system of record with updated records. We expect all missing appeals to be... -
County
Assessor - Single and Multi-Family Improvement Characteristics
Cook County of Illinois —
Single and multi-family (less than 7 units) property characteristics collected and maintained by the Assessor's Office for all of Cook County, from 1999 to present.... -
County
Assessor - Neighborhood Boundaries
Cook County of Illinois —
Neighborhood polygons used by the Cook County Assessor's Office for valuation and reporting. These neighborhoods are specific to the Assessor. They are intended to... -
County
Assessor [Archived 05-31-2023] - Parcel Universe
Cook County of Illinois —
A complete, historic universe of Cook County parcels with attached geographic, governmental, and spatial data. When working with Parcel Index Numbers (PINs) make sure... -
County
Cook County Clerk - Polling Place Locations - 2014 November 4 Gubernatorial Election
Cook County of Illinois —
Data Updated 10/27/2014. This dataset contains the Polling Place locations in suburban Cook County for the 2014 Gubernatorial Election on November 4. For more... -
County
Assessor - Parcel Addresses
Cook County of Illinois —
Situs and mailing addresses of Cook County parcels. Used by the Assessor's office to mail assessment notices. As of 2017 mailing addresses in this dataset are no... -
County
Cook County Address Points
Cook County of Illinois —
This dataset contains address points for addresses in Cook County. An ESRI Service is available at: https://hub-... -
County
Early Voting & Grace Period Registration and Voting - 2014 November 4 Gubernatorial Election
Cook County of Illinois —
This dataset details the hours and locations for voter registration and voting in suburban Cook County between Oct. 8 and election day, Nov. 4, 2014. Voters may visit... -
County
Early Voting Locations - 2016 March 15 Presidential Primary Election
Cook County of Illinois —
This dataset details the hours and locations for early voting for those living in suburban Cook County for the March 15, 2016 Presidential Primary Election. For more... -
County
Historical - ccgisdata - Parcel 2019
Cook County of Illinois —
The Parcel 2019 feature contains tax parcel polygons for the 2019 property tax assessment at the County. This feature reflects tax parcel polygons as they existed... -
County
Cook County Clerk -- Statement of Economic Interests Filers
Cook County of Illinois —
The update script for this dataset is currently broken. Please see the Cook County Clerk SEI Search for recent filings. For extended information about Statements of... -
County
Treasurer - Annual Tax Sale
Cook County of Illinois —
Under Illinois law, the Treasurer’s Office is required to hold an Annual Tax Sale. The sale is held once a year, sometime after the Second Installment. If property... -
County
Assessor [Archived 05-11-2022] - Residential COVID Adjustment Replication Data
Cook County of Illinois —
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... -
County
Cook County Recorder - Foreclosures, Mortgages, and Quit Claim Deeds - 2013 through March 27, 2015
Cook County of Illinois —
Foreclosures, Mortgages, and Quit Claim Deeds recorded with the Cook County Recorder of Deeds. Data covers 2013 through March 27, 2015. This dataset will be updated... -
County
Polling Place Locations - 2016 March 15 Presidential Primary Election
Cook County of Illinois —
This dataset contains the Polling Place locations in suburban Cook County for the 2016 Presidential Primary Election on March 15. For more information on Polling... -
County
Assessor [Archived 05-11-2022] - Residential Modeling Characteristics (Chicago)
Cook County of Illinois —
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...