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 may be missing a mailing/property address because the postal service has not yet assigned the property an address. Data attached to each PIN is the most recent available. For example, Census tract data is drawn from the 2014-2018 5-year American Community Survey.

The code and sources used to construct this data can be located on GitLab. See data notes for link.

This is a Cook County Feature class of Unincorporated Zoning District Boundaries (Aggregate). This data is provided by the Cook County Dept. Of Building and Zoning and is maintained by the Cook County Zoning Board of Appeals.
Only unincorporated district boundaries are available, please contact specific municipalities for questions regarding incorporated municipal zoning districts.

Data last updated September 8th, 2011

This Data Set contains a GIS/Map of Elected Officials in Cook County

The official statements below provide detailed information about the outstanding bonds issued by the County. The full faith and credit of the County is pledged to the punctual payment of the principal and of interest on General Obligation bonds, with a pledge of home rule sales tax revenues securing the associated sales tax revenue bond issues.

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

This dataset shows what agencies are in a tax code for each tax year along with the agency and tax code rates. Data is updated yearly. For more information on Tax codes and Tax agencies visit the Cook County Clerk's website at: http://www.cookcountyclerk.com/tsd/Pages/default.aspx

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 comparable properties are nearly always selected from within neighborhoods for the purposes of appeal. See data notes for additional information.

This dataset is updated nightly. For extended information about Lobbyist Activities in Cook County IL, visit the Cook County Clerk's Lobbyist search: http://lobbyist.cookcountyclerk.com/Public/SearchHome.aspx