Rock County
County in Wisconsin
Rock County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 163,687. Its county seat is Janesville. Rock County comprises the Janesville-Beloit, WI Metropolitan Statistical Area and is included in the... Wikipedia
Cities: Janesville, Milton, Beloit, and more
County seat: Janesville
Congressional districts: 1st, 2nd
Named for: Rock River