Lake Koshkonong is a lake in Jefferson County, Wisconsin. Its current pool elevation is about 777 ft (USGS gauge 05427235, 2026-06-23 20:00). We never estimate missing readings — a “—” means no current source.
Full conditions, things to do, and where to stay, eat, and rent on the Lake Koshkonong guide. More: boat rentals · cabins & rentals · fishing · things to do.