Public Boat Ramps on Lake Koshkonong, Wisconsin

We currently track 3 verified public boat ramps with access to Lake Koshkonong in Wisconsin, across 2 different counties. Use the map and ramp listings below to compare launch locations, fees and access details.

3 Boat ramps
2 Counties
No free ramps confirmed yet
Jefferson County Top county (2)

Map of Lake Koshkonong Boat Ramps

Compare every public boat ramp on Lake Koshkonong in one map. See where each launch is located, compare access points, and choose the most convenient place to get on the water.

Boat launch locations on Lake Koshkonong

Browse every verified launch site we've published on this waterway, with fee information, nearby towns and access details.

Gilbert Bay - Vinnie Haha Road Near Lake Koshkonong · Janesville · Jefferson County
Kuehn Road Near Lake Koshkonong · Janesville · Jefferson County
Royce-Dallman County Park Near Edgerton · Janesville · Rock County

Counties with access to the Lake Koshkonong

Lake Koshkonong runs through 2 counties we track ramps in. Jefferson County has the most, with 2 of them.

Jefferson County 2 ramps
Rock County 1 ramp

Frequently asked questions

The questions people ask most often before launching on Lake Koshkonong.

There are currently 3 public boat ramps on Lake Koshkonong in Wisconsin, spanning 2 counties.

We haven't confirmed any free ramps on Lake Koshkonong yet - check the fee badge on each listing for the latest status.

Jefferson County has the most, with 2 public boat ramps on Lake Koshkonong.

Sourced from Wisconsin Department of Natural Resources.
Data on this page was last updated September 28, 2026, based on the latest ramp data update.