Census
[When searching census indexes, such as at Ancestry.com, keep in mind the boundary area of Portage County in the early censuses.]
Portage
County Census Index (Searchable index to the 1850, 1860, 1870, 1880,
and 1900 U.S. Censuses of Portage County, Wisconsin)
1850 Portage County Census Information
1900 Portage County Census Information
Wisconsin State Census records on FamilySearch.org (Search by name or Browse by County.)
1855
1875
1885
1895
1905
1940 U.S. Census PowerPoint Presentation by Karla Leppen. (Note: this was created on PowerPoint 2010. Earlier versions of PowerPoint cannot open the file. A free "read only" copy of PowerPoint can be downloaded from the Microsoft site.)