What is the largest natural lake in the world,measured in square miles?

Answer 1

The world's largest lake is the salty Caspian Sea at 143,200 square miles

The world's second largest lake, and the world's largest freshwater lake is North America's Lake Superior at 31,700 square miles

Answer 2

Lake Biakal in Siberia.

"At 1600 meters (5277 feet}, Lake Baikal is the deepest freshwater lake in the world, as well as the largest by volume. It holds approximately 20 percent of the world's total surface fresh water (23,000 cubic kilometers of water).[3] It contains more than 90% of Russia's fresh surface liquid water and is a World Heritage Site.[4] Olkhon, by far the largest island in Lake Baikal, is the second largest lake-bound island in the world (the largest being Manitoulin Island in Lake Huron).[5]"

Answer 3

Caspian Sea at 143,200 miles, followed by Lake Superior.