Community Economic Toolbox , Developed by Penn State University.
First, select the state and then the county that you’re interested in examining (you must first click “Next” toward the bottom right corner of the page). After that, you’ll be led through each step of the toolbox. In some of the tools you will be able to download data. You can also copy the graphics produced in the toolbox for your own report and public presentations.
The Wisconsin Department of Revenue (DOR) publishes annual reports for counties that have adopted the 0.5% optional sales tax. This link also has information about the sales and use tax more generally.