This data includes 2009 precincts used for all elections 2010 thru 2011. 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.

This data includes 2009 precincts used for all elections 2010 thru 2011. 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.

This data includes 2011 precincts used for all elections 2012 thru 2015. 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.

This data includes 2011 precincts used for all elections 2012 thru 2015. 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.

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.

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.