Law Enforcement Agencies in Janesville, WI WI › Rock County Agencies serving the city of Janesville in WI. Agency Types in Janesville Campus Police 1 agencies County Jails 1 agencies Municipal Police 1 agencies Sheriff 1 agencies All Agencies in Janesville, WI Janesville Police Department Rock County Rock County Jail Rock County Rock County Sheriffs Office Rock County UW Whitewater at Rock County Rock County
