Cook_County_GISThe purpose of this dataset is to indicate the boundary of each US Congressional District within Cook County, Illinois. These boundaries are based off of Census 2010 geographies. Created for all users to view and understand jurisdictional boundaries within Cook County. US Congressional Districts are redrawn every 10 years based on the decennial census. Clerk Elections maintains the US Congressional District feature.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/c3becae657354d7e812a78c3271acaa6_2010engCook CentralPublicUS Congressional District - Historical - Based on 2010 Census [Illinois--Cook County]Web servicesIllinois--Cook CountyIllinois2010