Wisconsin Lake Finder

Lake Koshkonong

Lake Koshkonong is a 10,595-acre lake in Jefferson, Rock and Dane counties, Wisconsin, up to 7 feet deep, with 586 waterfront parcels on its shore. Fish include musky, panfish, largemouth bass, smallmouth bass, northern pike, walleye and catfish. It has 4 public boat landings, a public beach and public land or a park on the shore.

• Size: 10,595 acres
• Deepest point: 7 ft
• Average depth: 5 ft
• Bottom: 80% muck, 10% sand, 10% gravel
• Fish: Musky, Panfish, Largemouth bass, Smallmouth bass, Northern pike, Walleye, Catfish
• Public access: 4 public boat landings, a public beach and public land or a park on the shore
• Boating: Full recreation: over 50 acres, so open to water-skiing and boating at speed under state law
• Drive time without traffic: Madison 35 min, Rockford 50 min, Waukesha 1 hr, Milwaukee 1 hr 10 min, Chicago 1 hr 50 min, Appleton 2 hr 5 min, Green Bay 2 hr 30 min, Eau Claire 3 hr, Twin Cities 4 hr 5 min
• Invasive species on record: Curly-Leaf Pondweed, Zebra Mussel
• Waterfront parcels: 586 waterfront parcels

Questions about Lake Koshkonong

How many waterfront properties are on Lake Koshkonong?

586 waterfront parcels front Lake Koshkonong: 431 in Jefferson County, 119 in Rock County and 36 in Dane County. That counts parcels on the water from county parcel maps, not homes for sale.

How big is Lake Koshkonong?

Lake Koshkonong covers 10,595 acres in Jefferson, Rock and Dane counties, Wisconsin.

How deep is Lake Koshkonong?

Lake Koshkonong is 7 feet deep at its deepest point, and 5 feet deep on average.

What fish are in Lake Koshkonong?

The Wisconsin DNR lists musky, panfish, largemouth bass, smallmouth bass, northern pike, walleye and catfish in Lake Koshkonong.

Is there public access to Lake Koshkonong?

Yes. Lake Koshkonong has 4 public boat landings, a public beach and public land or a park on the shore.

Can you water-ski or run a boat at speed on Lake Koshkonong?

Lake Koshkonong is over 50 acres, so Wisconsin's slow-no-wake rule for small lakes does not apply and boats may run at speed, staying slow within 100 feet of shore, docks and swimmers. No local boating ordinance that limits motorboats is on record.

How long is the drive to Lake Koshkonong?

By car, Lake Koshkonong is about 35 min from Madison, 50 min from Rockford, 1 hr from Waukesha, 1 hr 50 min from Chicago and 4 hr 5 min from the Twin Cities. Those are typical times without traffic, to the nearest road at the lake.

What is the bottom of Lake Koshkonong like?

The lake bottom is 80% muck, 10% sand, 10% gravel, by the Wisconsin DNR's record.