Lake trip · Jefferson County, Wisconsin
Where to stay at Lake Koshkonong
Lake Koshkonong covers 10,595 acres in Jefferson County and carries a water-quality grade of F (Very Poor). Compare cabins, resorts, and vacation rentals below, then check the water before you book. Late spring through early fall, with June through August the peak season for swimming, boating, and fishing.
Places to stay near Lake Koshkonong
Cabins, resorts, hotels, and vacation rentals near Lake Koshkonong in Jefferson County, Wisconsin — live availability and prices. Add your dates to see totals.
Top-rated places to stay near Lake Koshkonong
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Before you book: the water
Lake Koshkonong grades F for water quality — Very Poor. Avoid swimming, very poor water quality, potential algae toxins. Water clarity is about 1.7 ft of visibility.
Best time to visit
Late spring through early fall, with June through August the peak season for swimming, boating, and fishing.
Check the National Weather Service forecast for Lake Koshkonong →
About Lake Koshkonong
Fish: Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye, Catfish.
Camping & RV near Lake Koshkonong
Base your trip at a nearby state park for tent and RV camping and trails, with Lake Koshkonong a short drive away — or search all public campgrounds and RV sites in the area on Recreation.gov.
- Lake Kegonsa State Park · State Park15.4 mi
- Aztalan State Park · State Park16.1 mi
- Capital Springs State Recreation Area · State Recreation Area21.9 mi
Common questions
Frequently Asked Questions
Cabins, resorts, and vacation rentals around Lake Koshkonong in Jefferson County, Wisconsin are on the map above with live availability and nightly prices. Waterfront rentals put you on the dock; lodging in the nearest town is usually cheaper with more choice. Lake Kegonsa State Park is about 15.4 miles away for campground options.
Lake Koshkonong has a LakeQuality water-quality grade of F (Very Poor). Avoid swimming, very poor water quality, potential algae toxins. Always check local health-department advisories before swimming.
Late spring through early fall, with June through August the peak season for swimming, boating, and fishing.
LakeQuality Lake Trip Planner (2026)
Free trip-planning guide for Lake Koshkonong: how to pick a clean lake, the water-quality signals that matter, best swimming and fishing windows, and where to stay.
Lodging availability and prices are provided by Stay22 and its booking partners (Booking.com, Vrbo, Expedia); LakeQuality may earn a commission from bookings at no extra cost to you. Water-quality grades are independent of lodging listings. Always check current health-department advisories and managing-agency conditions before you travel.