In 2019, Rock County, WI had a population of 162k people with a median age of 39.5 and a median household income of $57,875. Between 2018 and 2019 the population of Rock County, WI grew from 161,769 to 162,152, a 0.237% increase and its median household income grew from $55,832 to $57,875, a 3.66% increase.
The 5 largest ethnic groups in Rock County, WI are White (Non-Hispanic) (82.8%), Black or African American (Non-Hispanic) (4.31%), White (Hispanic) (4.22%), Other (Hispanic) (3.8%), and Two+ (Non-Hispanic) (2.6%). 0% of the households in Rock County, WI speak a non-English language at home as their primary language.
97.3% of the residents in Rock County, WI are U.S. citizens.
In 2019, the median property value in Rock County, WI was $146,200, and the homeownership rate was 68.4%. Most people in Rock County, WI drove alone to work, and the average commute time was 22.2 minutes. The average car ownership in Rock County, WI was 2 cars per household.