Lake Wissota is a reservoir in Chippewa County, Wisconsin, United States, just east of the city of Chippewa Falls. It covers an area of 6,024 acres (2,438 ha) and has a maximum depth of 72 feet.
The lake is a popular recreation destination in northwestern Wisconsin, in the summer for boating, canoeing, fishing, water skiing, and swimming, and in the winter for ice fishing. On the northeastern shore lies Lake Wissota State Park, popular with campers, hikers, swimmers, and anglers.
The lake was formed by the construction of the Wissota Hydroelectric Dam on the Chippewa River, completed in 1917. The dam was built by the Wisconsin-Minnesota Light and Power Company. An engineer on the project, Louis G. Arnold, named the lake by combining the beginning of "Wisconsin" and the ending of "Minnesota".
In the 1997 film Titanic, Leonardo DiCaprio's character Jack Dawson mentions that he went ice fishing on the frozen waters of Lake Wissota as a boy. This would have been impossible, as the RMS Titanic sank in 1912, three years before construction on the dam that formed Lake Wissota began.