In 2020, Rock County, WI had a population of 163k people with a median age of 39.8 and a median household income of $59,519. Between 2019 and 2020 the population of Rock County, WI grew from 162,152 to 162,532, a 0.234% increase and its median household income grew from $57,875 to $59,519, a 2.84% increase.
The 5 largest ethnic groups in Rock County, WI are White (Non-Hispanic) (81.9%), Black or African American (Non-Hispanic) (4.59%), Other (Hispanic) (4.27%), White (Hispanic) (3.54%), and Two+ (Non-Hispanic) (2.87%).
None of the households in Rock 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.
97.4% of the residents in Rock County, WI are U.S. citizens.
In 2020, the median property value in Rock County, WI was $156,800, and the homeownership rate was 68.4%. Most people in Rock County, WI drove alone to work, and the average commute time was 23.2 minutes. The average car ownership in Rock County, WI was 2 cars per household.