Czechs (Bohemians) in Wisconsin according to the 1900 federal census.
A small but significant number of Czech immigrants settled in Wisconsin beginning in the late 1840s. Early documents refer to these settlers as “Bohemians” due to their origin in Bohemia, a historical region in central Europe that is today part of the Czech Republic. This map illustrates the scattered distribution of Czech settlements in Wisconsin including the southeast (Racine County), the eastern lakeshore (Manitowoc and Kewaunee counties), and the coulee region of the southwest (La Crosse, Vernon and Grant counties).
via: Historical Maps Collection, Wisconsin Historical Society
read more: Karel D. Bicha, “The Czechs in Wisconsin History,” Wisconsin Magazine of History vol. 53, no. 3 (1970)