- Location: Lake Superior is in North America, bordered by the United States and Canada. It touches four U.S. states—Minnesota, Wisconsin, Michigan, and a small part of Illinois—and one Canadian province, Ontario. It is the westernmost and northernmost of the Great Lakes.
- Formation: Lake Superior was formed over 10,000 years ago during the last Ice Age.
- Major Cities on Lake Superior: The key cities along Lake Superior include important ports and urban centers.
- United States: Duluth (Minnesota), Superior (Wisconsin), Marquette (Michigan), Houghton (Michigan).
- Canada: Thunder Bay and Sault Ste. Marie (Ontario).
- Size of Lake Superior: Lake Superior is the largest of the Great Lakes by area and volume.
- Surface Area: ~31,700 sq mi (82,100 sq km)
- Volume: ~2,900 cu mi (12,100 cubic km)
- Length: ~350 mi (563 km)
- Width: ~160 mi (257 km)
- Average Depth: ~483 ft (147 m)
- Shoreline: ~2,726 miles (4,387 km)
- Largest Freshwater Lake in the World: Lake Superior holds the title of the largest freshwater lake by surface area. Its volume contains about 10% of the world’s surface fresh water.
- Major Rivers Feeding Lake Superior: Several rivers from both the U.S. and Canada flow into Lake Superior.
- United States Side: St. Louis River, Pigeon River, Ontonagon River, Michipicoten River
- Canada Side: Nipigon River, Pic River, Kaministiquia River
- Islands in Lake Superior: Notable islands include Isle Royale (Michigan, a national park), Madeline Island (Wisconsin), Michipicoten Island (Ontario), and Thunder Cape Island (Ontario).
- Protected Areas: Includes Isle Royale National Park (U.S.) and several provincial parks in Ontario.
- Temperature: Surface temperatures range from 32°F (0°C) in winter to about 60–70°F (16–21°C) in summer. Deep waters remain near 39°F (4°C) year-round.
- Wildlife: Home to bald eagles, moose, black bears, and wolves around the lake’s shores and islands.
- Fish Found in Lake Superior: Lake Superior is home to over 80 fish species, including lake trout, whitefish, walleye, perch, and northern pike.
- Biggest Fish in Lake Superior: The lake trout is among the largest native species, with some individuals exceeding 100 lbs (45 kg).
- Shipwrecks: More than 350 shipwrecks recorded in the lake due to storms and rough waters. Famous wrecks include the SS Edmund Fitzgerald (1975), the SS Kamloops (1927), and the SS Daniel J. Morrell (1966).
- Lighthouses: Lake Superior has dozens of historic lighthouses guiding ships through dangerous waters. Notable ones include Split Rock Lighthouse (Minnesota), Whitefish Point Lighthouse (Michigan), and Thunder Bay Lighthouse (Ontario).