Datasets
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Inspector General - Employment Plan Officer Semi-Annual Reports
Pursuant to the Employment Plan, the OIIG Employment Plan Officer will issue semi-annual reports every March 15 and September 15 to the President, the IIG, and the Compliance... -
Medical Examiner - Unidentified Persons
This dataset contains descriptions of unidentified remains whose cases have been processed by the Medical Examiner’s Office. Call 312-666-0500 to speak to Deputy Chief... -
Inspector General - Prohibition of Discrimination and Harassment Quarterly Reports
The Independent Inspector General submits Quarterly Reports to the President and the County Board. Quarterly Reports summarize the status of compliance efforts of Cook County... -
Campaign Contributions - Restricted Contractors
Under Cook County Ethics Code Section 2-585, campaign contributions to County elected officials are limited to $1,500 per calendar year if the contributor is currently doing or... -
Inspector General - Public Statements
The Independent Inspector General is authorized to issue public statements in two circumstances: When an investigation that exonerates an individual who is publicly known to... -
CCP Invoice Register
This dataset provides a cumulative record of payment and invoice details for County suppliers, vendors and other payees. Data is from December 1, 2016 to present. Payment data... -
Medical Examiner Case Archive
Effective April 1, 2022, the Cook County Medical Examiner’s Office no longer takes jurisdiction over hospital, nursing home or hospice COVID-19 deaths unless there is another... -
Procurement - Intent to Award
This dataset provides the list of vendors to be recommended for award at the Cook County Board Meetings and are posted below for public viewing. M/W/DBE Participation Types MBE... -
Cook County Check Register
This dataset provides a cumulative record of payment and invoice details for County suppliers, vendors and other payees. Data is from December 1, 2016 to present. Payment data... -
Assessor - Parcel Addresses
Situs and mailing addresses of Cook County parcels. Used by the Assessor's office to mail assessment notices. This dataset was updated in March 2026 to include both owner and... -
Assessor - Appeals
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 available again... -
Assessor - Single and Multi-Family Improvement Characteristics
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. The office... -
Assessor - Parcel Sales
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 wish to... -
Assessor - Property Tax-Exempt Parcels
Parcels with property tax-exempt status across all of Cook County per tax year, from Tax Year 2022 on, with geographic coordinates and addresses. Properties of religious,... -
Assessor - Assessed Values
Land, building, and total assessed values for all Cook County parcels, from 1999 to present. The Assessor's Office uses these values for reporting, evaluating assessment... -
Sentencing
This dataset is no longer actively maintained as of 12/30/2024. Please visit the site below to explore data dashboards published by the State’s Attorney’s Office beginning 2025.... -
STAR Quarterly Performance Data
Quarterly STAR Data Sec. 2-932. - Quarterly Submissions to President and Board Each County Department and Agency shall prepare a Quarterly Record wherein it shall define its... -
Assessor - Parcel Universe (Current Year Only)
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 to zero-pad... -
Assessor - Parcel Universe
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-... -
Medical Examiner - Unclaimed Persons
This dataset contains our most up to date list of Unclaimed Persons found in Cook County. If you feel you are the next of kin to any of the individuals listed, Please contact...