In 2017, Rock County, WI had a population of 161k people with a median age of 39.3 and a median household income of $53,410. Between 2016 and 2017 the population of Rock County, WI grew from 160,986 to 161,226, a 0.149% increase and its median household income grew from $50,968 to $53,410, a 4.79% increase.
The population of Rock County, WI is 83.3% White Alone, 8.42% Hispanic or Latino, and 4.35% Black or African American Alone. N/A% of the people in Rock County, WI speak a non-English language, and 97.1% are U.S. citizens.
The median property value in Rock County, WI is $135,000, and the homeownership rate is 68.7%. Most people in Rock County, WI commute by Drove Alone, and the average commute time is 22 minutes. The average car ownership in Rock County, WI is 2 cars per household.