This is the public access interactive mapping website for Lake County, Illinois. If this is your first visit we recommend that you read the Guide. Note - Internet Explorer users: To properly add this web site to your Favorites you must click here. Begin by selecting one of the Applications listed above. Some functions in this family of applications require Adobe Acrobat Reader, which can be downloaded here. Some reports, maps for printing and documentation are provided on request in pop-up windows; your browser must allow popups in order to produce these. Maps, aerial photography and other products are also available for purchase. Further information is available here. The information offered in these applications is subject to the Lake County Website Policy for the Lake County, Illinois website. Contact GIS/Mapping Staff GIS/Mapping Home Page Lake County Home Page