Rock County, WI has a population of 160,986 people with a median age of 39.1 and a median household income of $50,968. Between 2015 and 2016 the population of Rock County, WI grew from 160,727 to 160,986, a 0.16% increase and its median household income grew from $50,324 to $50,968, a 1.28% increase.
The population of Rock County, WI is 83.6% White, 8.21% Hispanic, and 3.4% Black. 8.31% of the people in Rock County, WI speak a non-English language, and 97.1% are U.S. citizens.
The largest universities in Rock County, WI are Blackhawk Technical College, with 650 graduates, Beloit College, with 404 graduates, and First Class Cosmetology School, with 40 graduates.
The median property value in Rock County, WI is $132,500, and the homeownership rate is 68.9%. Most people in Rock County, WI commute by Drove Alone, and the average commute time is 21.9 minutes. The average car ownership in Rock County, WI is 2 cars per household.
Rock County, WI is the 9th most populated county in Wisconsin and borders Boone County, IL; Winnebago County, IL; Dane County, WI; Green County, WI; Jefferson County, WI; and Walworth County, WI& 1 more.