Rock County is a county in the U.S. state of Wisconsin. It is included in the Janesville, Wisconsin Metropolitan Statistical Area. As of 2000, the population was 152,307. Its county seat is Janesville. Rock County has many different activities to try and many interesting places to visit. The rural towns and villages, as well as the cities, are steeped in history. From old mills to the Underground Railroad, come to Rock County to experience the nostalgic feelings of yesteryears. Don't forget about the new places, too. From shopping malls to paintball, it can be found in Rock County.
Learn more about this county.County of Rock, WI Chamber of CommerceCounty of Rock, WI official siteState of Wisconsin official site