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 that the 'adjusted values' in this data will not necessarily be consistent with each individual PIN's final assessment. To get the final assessment for an individual PIN, please visit www.cookcountyassessor.com.

This dataset contains roads under Cook County jurisdiction. The MAINT attribute is "True" for roads maintained by the County

Data last updated 06/19/2015.

IL State Senate Districts based on Census 2010

Forest Preserve District of Cook County boundaries. To view or use these shapefiles, compression software and special GIS software, such as ESRI ArcGIS, is required.

Annual Tax Sale: A yearly auction of delinquent taxes where a tax buyer (purchaser) pays the delinquent taxes due on a parcel. This results in a lien on the property. The property owner must repay the tax buyer with interest for the amount of the sale – this is known as “redemption.” If redemption does not occur within a set time period, the tax buyer can obtain legal title to the property – this is referred to as a “tax deed.”

The feature class Right-of-Way indicates tax exempt rights-of-way digitized from recorded plats.

2021 assessor neighborhoods used by the Cook County Assessor's Office for valuation and reporting.

The County's system of tax maps is based on the Illinois Public Land Survey System (PLSS). In the PLSS, each township is divided into 36 sections, and each section into four quarter-sections. A quarter-section is further divided into two tax map sheets, often called "pages". Each tax map (1/4 mile by 1/2 mile) represents the east or west half of one quarter-section, and typically there are eight tax maps per section.

The Cook County Department of Emergency Management and Regional Security (EMRS) reminds residents to take appropriate precautions to protect themselves and their families.

Municipalities and townships across Cook County are opening warming centers for residents. Residents who do not have adequate heating in their homes are encouraged to visit a warming center to ensure they remain safe.

Municipalities around Cook County have opened cooling centers for area residents as temperatures start to rise. Residents who need to seek shelter should contact the center first to verify it is open. This dataset will be no longer updated on May 1, 2019. Please refer to this link for future updates: https://datacatalog.cookcountyil.gov/dataset/Cook-County-Cooling-Centers-Map/dnn9-esge