State genealogical and historical societies may have records and services to help you with your research.
For a list of helpful books with addresses of county genealogical and historical societies in Wisconsin, see the "Archives and Libraries" and "Societies" sections of the United States Research Outline (30972).
Many counties also have local historical and genealogical societies. You can find local society addresses by using directories cited in the "Societies" section of the United States Research Outline (30972). Also see the "Archives and Libraries" section of this outline.