GetFacts, formerly WISSTAT, contains thousands of demographic and economic variables for the state of Wisconsin, its counties and smaller communitites. The sources of the data include the U.S. Census Bureau and various State and Federal agencies. The WISSTAT design is extensible to include additional geographies, increasingly powerful queries, additional data sets, and new outputs. (Updates vary)
This permalink is a direct, persistent URL to the database that will always work and won't break.