Boating

Largest Lakes in Wisconsin: Biggest Lakes By Size

April 24, 2026

Wisconsin is home to more than 15,000 lakes set in a scenic background. The miles of streams contribute to about 3% of the total area of the state. It features an incredible variety of lakes, including wild lakes and glacial-formed lakes. From serene inland lakes to the great Michigan and Superior lakes, it is one of the top states with a large lake count. Here is a guide exploring the largest lakes by size, their locations, and their unique features. Some lakes are popular for their picturesque beauty, some for fishing, and others for recreational water sports. Let’s dive into the largest lakes in Wisconsin.

Largest Lakes in Wisconsin By Size

Here is a table comparing the largest lakes in Wisconsin.

Name of the LakeSizeLocationKey Highlight
Lake Superior (total)~20,288,000 acres (Wisconsin shares ~2.7 million acres)Northern edgeScenic beauty, camping, kayaking
Lake Michigan (total)~14,272,000 acres (Wisconsin shares ~7,358 sq mi of jurisdiction)Eastern borderBoating, hiking, biking
Lake Winnebago~138,000 acresEast Central WisconsinFishing
Petenwell Lake~23,173 acresCentral WisconsinBoating, sailing, fishing
Castle Rock Lake~16,640 acresCentral WisconsinFishing, boating, watersports
Lake Chippewa Flowage~15,300 acresNorthwestern WisconsinFishing, camping, snowmobiling
Lake Mendota~9,781 acresMadisonBoating, sailing, kayaking
Lake Butte des Morts~8,857 acresWinnebago CountyBoating, sailing, and fishing
Lake Wissota~6,148 acresChippewa CountyBoating, camping

The Largest Lakes in Wisconsin You Should Know

Lake Winnebago

It is the largest inland lake, sprawling across approximately 138,000 acres. Located in east-central Wisconsin, the unique feature of Lake Winnebago is its shallow structure. Though it is several miles wide and long, its average depth is just about 15.5 feet. It is one of the top destinations for freshwater fishing. The place is popular for year-round activities, including boating, fishing, hiking, ice fishing, and kayaking.

Lake Michigan (Wisconsin Side)

With a surface area of about 22,300 square miles, Lake Michigan is the third-largest Great Lake by surface area and the only Great Lake entirely within the United States. The key attractions of the Wisconsin side of the lake include state parks, major cities, and a scenic peninsula. The shoreline is busy and beautiful with harbors and sandy beaches. The lake is popular for its underwater caves, stunning beauty, and unique ecosystem. Fishing for salmon and trout is a famous activity here.

Lake Superior (Wisconsin Side)

It is the largest freshwater lake in the world by surface area. Wisconsin’s Lake Superior shoreline stretches more than 150 miles, with a coastline that is spectacular with sandy beaches, towering cliffs, harbor towns, dense forests, historic lighthouses, caves that freeze in winter, and picture-perfect islands. The popular activities of the lake include boating, kayaking, fishing, and hiking. The distinct feature of the lake is its cold and clear water.

Petenwell Lake

Offering more than 23,000 acres of water for boating and fishing, Petenwell Lake is the state’s second-largest inland lake. It is located in Central Wisconsin and is renowned for walleye fishing. The lake is one of the favorites of recreation lovers as it offers thrilling activities like sailing, jet skiing, powerboating, and kayaking. Bird watching is also popular here because bald eagles are frequently seen in the area.

Lake Chippewa Flowage

Spanning over 15,000 acres in northern Wisconsin, Lake Chippewa Flowage is an artificial lake and Wisconsin’s largest wilderness lake. This lake is created by a dam and is dotted with about 200 primitive islands. It is known for musky fishing and attracts serious anglers. Boating on the musky waters and exploring the maze of islands is a unique and unforgettable experience. It is a perfect destination for lovers of peace and solitude.

Lake Mendota

It is a 9,781-acre eutrophic freshwater lake situated in Madison. Summer, winter, or fall, whatever the season, the lake has something to offer its visitors. It is boating, kayaking, canoeing, and swimming in the summer, and ice fishing, ice hockey, cross-country skiing, and snowkiting in the winter. The blend of urban setting with natural beauty makes it special. It is an ideal choice for people who love a lively atmosphere.

Castle Rock Lake

It is a 16,640-acre artificial lake, surrounded by biking paths, hiking trails, picnic areas, and shelters. The family-friendly environment, favorable for swimming, camping, and boating, and the sandy shores, make it one of the most-visited lakes. It is also a splendid place to watch a huge variety of birds and listen to their chirping. The sailors love this destination for its open layout and winds.

Lake Wissota

Spanning more than 6,000 acres, Lake Wissota, located near Chippewa Falls, is famously referenced in the 1997 *Titanic* movie, though it wasn’t filmed there. The reference is actually a well-known historical inaccuracy, since Lake Wissota was created in 1917, five years after the Titanic sank in 1912. The clear waters and relaxed atmosphere are one of its pluses. The numerous trails for hiking, biking, camping, and horseback riding, the playground areas, and picnic areas make it a perfect destination for people of all ages and interests. The popular summer activities include kayaking, canoeing, and boating.

Lake Butte des Morts

It is a freshwater lake situated in Winnebago County, Wisconsin. Lake Butte des Morts spans approximately 8,857 acres of surface area. Its shallow waters make it suitable for fishing, boating, and swimming. The water clarity is low, but it provides excellent fishing opportunities, especially for perch and bass. The destination is also popular for birdwatching, skiing, boating, and other recreational activities such as hiking, biking, and picnicking.

What You Can Do on Wisconsin’s Largest Lakes?

Wisconsin’s largest lakes offer a lot of opportunities to have fun and a lot of activities to indulge in and enjoy.

Fishing for Walleye, Bass, and Freshwater Species

Anglers of all types and levels can fish year-round, including ice fishing in winter, though specific species have seasonal regulations set by the Wisconsin DNR. The hot spots for fishing are Lake Chippewa Flowage, Lake Winnebago, Lake Butte des Morts, Lake Michigan, and Lake Mendota. Walleye, bass, panfish, bluegill, crappie, northern pike, and muskellunge are some of the species found in the lakes.

Boating, Pontoon Cruising, and Lake Exploration

The crowd-free Castle Rock Lake is perfect for indulging in thrilling watersports, including stand-up paddleboarding, windsurfing, jet skiing, and more. With wide open waters, Lake Petenwell is perfect for going on pontoon cruising. With plenty of caves, coves, and tunnels, Lake Superior offers diverse lake exploration opportunities, especially in the Apostle Islands.

Sailing and Open Water Experiences on the Great Lakes

Open water sailing around the Apostle Islands in Lake Superior is phenomenal. With strong winds and rushing waves, Lake Winnebago and Lake Mendota promise ocean-like boating and sailing experiences.

Swimming, Beaches, and Waterfront Relaxation

Lake Michigan and Lake Mendota have sandy shores where you can relax and swim. Castle Rock Lake and Lake Wissota provide family-friendly picnic areas and shallow zones for swimming. The largest lakes in Wisconsin provide an ideal setting for relaxing and unwinding.

Camping, Cabins, and Scenic Getaways

With rustic to modern cabins, Lake Chippewa Flowage is one of the best places for experiencing cabin stays. Lake Wissota and Petenwell Lake provide peaceful retreats with campgrounds surrounded by forests.

Tips For Visiting Wisconsin’s Largest Lakes

Choosing the Right Lake Based on Your Interests

Make sure you choose the right destination popular for the activity you love the most. For example, Lake Winnebago is ideal for walleye fishing, Chippewa Flowage for musky fishing, Castle Rock for jet skiing, Petenwell for open water sailing, and Lake Wissota for camping.

Understanding Weather and Water Conditions

Watch for weather changes. High temperatures can affect the water quality. Keep monitoring for high waves and blue-green algae blooms. Some lakes, like Lake Superior, are prone to sudden weather shifts. Check local forecasts.

Safety Essentials for Boating and Swimming

Avoid alcohol if you are swimming or boating. Wear life jackets and carry all essential safety gear and visual distress signals while boating. Don’t go beyond the swimming zones.

Access Points, Marinas, and Launch Areas

There are numerous public boat launches and private marinas. Book them in advance to avoid congestion and ensure easy entry.

Following Local Rules and Protecting Nature

Respect the fishing and swimming limits. Follow the boating rules, water traffic rules, and speed limits. Avoid contaminating the lakes. Preserve the natural beauty of the lakes.

Are Wisconsin’s Largest Lakes Worth Visiting?

With natural charm, diverse activities, and peaceful surroundings, they are surely worth visiting. From the inland to the Great Lakes, they offer something or other for every visitor. Whether you love fishing, watersports, swimming, boating, sailing, hiking, biking, or just relaxing, Wisconsin lakes are the best destination. They provide unlimited recreation to all travelers. The breathtaking beauty of the forest-lined shores and the waterfront cities welcomes everyone.

If you’re looking to have a great time on the water, you should check out the boat rental options in Wisconsin. Boat rentals are a splendid alternative to enjoy a day on the water without the hassles of ownership. Visit Slipstream to learn more about boat rentals in Wisconsin.

FAQs

What is The Largest Lake In Wisconsin?

Lake Winnebago is Wisconsin’s largest inland lake, covering approximately 138,000 acres. It is one of the top fishing destinations, especially for walleye, panfish, and sturgeon, with stunning shorelines and picturesque beauty. It is a hub for diverse recreations.

Is Lake Michigan Part of Wisconsin?

Yes, Lake Michigan borders the entire eastern edge of Wisconsin, but it is shared with other states, including Michigan, Illinois, and Indiana. The lake bed is owned by four states, including Wisconsin, with approximately 7,358 square miles under Wisconsin’s jurisdiction.

How Many Lakes Are In Wisconsin?

With several hundred miles of shoreline, Wisconsin is home to more than 15,000 lakes, including the inland and Great Lakes. Most of its lakes were formed by glaciers, the deepest lake being Green Lake, and the largest inland lake being Lake Winnebago.

Which Wisconsin Lakes Are Best For Boating?

The lakes best for boating in Wisconsin include Lake Winnebago for powerboating and cruising, Lake Petenwell for pontoon rides and jet skiing, Castle Rock Lake for boating for beginners, Lake Mendota for luxury boating, Lake Michigan for coastal cruising, and Lake Geneva for water adventures.

What Is The Deepest Lake In Wisconsin?

The deepest lake in Wisconsin is Green Lake (also called Big Green Lake), a natural inland lake approximately 237 feet deep. It is located near the city of Green Lake in Green Lake County, and is popular for its clear water, freshwater diving, underwater drop-offs, and excellent fishing opportunities.