The 5 largest ethnic groups in Columbia County, WI are White (Non-Hispanic) (90.9%), Two+ (Non-Hispanic) (2.24%), Two+ (Hispanic) (1.7%), Black or African American (Non-Hispanic) (1.68%), and White (Hispanic) (1.12%).
None of the households in Columbia County, WI reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
98.8% of the residents in Columbia County, WI are U.S. citizens.
Columbia County, WI borders Adams County, WI, Dane County, WI, Dodge County, WI, Green Lake County, WI, Juneau County, WI, Marquette County, WI, and Sauk County, WI.