Loading view. There were no results found. There were no results found. Rock County Courthouse Amphitheater Events Venues Rock County Courthouse Amphitheater 51 S. Main St. Janesville, WI 53545 United States Get Directions 608-743-2200 http://www.co.rock.wi.us/ Events at this venue Today Upcoming Upcoming Select date. Previous Events Today Next Events Subscribe to calendar Google Calendar iCalendar Outlook 365 Outlook Live Export .ics file Export Outlook .ics file