Welcome to Cook County GIS! In December 2013, the Cook County Board of Commissioners passed an ordinance that allows Cook County GIS to post data that we previously charged for to be placed in our Open Data portal. Once there, the data will be free. Our goal is post at a minimum 2 major datasets per month as well as post .pdf of maps in the Open Data portal. We have already started this process. Click here to see the newest GIS data. Additionally Cook County GIS is developing a self-service solution that will allow the public to freely browse and download large GIS datasets. We hope to make it available by 3rd quarter of 2014.However, if you have a custom data request that requires the time of our analysts, this service can be performed at a reasonable rate. To make a request and get an accurate cost estimate, please contact us at firstname.lastname@example.org.If you have any questions or comments, click here to contact us.