Cook_County_GISThe purpose of this dataset is to indicate the boundary of each Illinois State Senate District within Cook County, Illinois. These boundaries are based off of Census 2000 geographies. Created for all users to view and understand jurisdictional boundaries within Cook County. Illinois State Senate Districts are redrawn every 10 years based on the decennial census. Clerk Elections maintains the Illinois State Senate District feature.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/e4594f180d3f4d519e13acb7e7f99482_2000engCook CentralPublicIllinois State Senate District - Historical - Based on 2000 Census. [Illinois--Cook County]Web servicesIllinois--Cook CountyIllinois2000