The Parcel 2008 feature contains tax parcel polygons for the 2008 property tax assessment at the County. This feature reflects tax parcel polygons as they existed from 1/1/2008 through 12/31/2008. Each parcel is uniquely identified with a Property Index Number (PIN).

The Parcel 2007 feature contains tax parcel polygons for the 2007 property tax assessment at the County. This feature reflects tax parcel polygons as they existed from 1/1/2007 through 12/31/2007. Each parcel is uniquely identified with a Property Index Number (PIN).

The Parcel 2006 feature contains tax parcel polygons for the 2006 property tax assessment at the County. This feature reflects tax parcel polygons as they existed from 1/1/2006 through 12/31/2006. Each parcel is uniquely identified with a Property Index Number (PIN).

Election Precinct Data- Current consists of 2015 precincts used for the 2016 primary and general elections. The purpose of the feature class is to describe and locate election precincts in Cook County, Illinois for general use by the public and business requirements of the Cook County Election Department, the Clerk's Office, and the Illinois Board of Elections.

Unit School Taxing Districts in Cook County

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

Political Townships in Cook County

The feature class LOT contains lot polygons as shown on the tax map.

Unit School Taxing Districts in Cook County

Sanitary Taxing Districts within Cook County