Cook_County_GISThe purpose of this dataset is to indicate the boundary of each State Senate District within Cook County, Illinois. These boundaries are based off of Census 2010 geographies and were effective circa 2/3/2012 through 1/11/2023. 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/3f8dcaf7fa0a499396e3ba26021ebb68_2010engCook CentralPublicIllinois State Senate Districts - Historical - Effective 2012 - 2023 based on 2010 Census [Illinois--Cook County]Web servicesIllinois--Cook CountyIllinois2012-2023