<Tr> <Th> Settlements </Th> <Td> Lake Geneva, Fontana - on - Geneva - Lake, Williams Bay </Td> </Tr> <P> Geneva Lake is a body of freshwater in Walworth County in southeastern Wisconsin . On its shores are the city of Lake Geneva, and the villages of Fontana - on - Geneva - Lake, and Williams Bay . </P> <P> The lake covers an area of approximately 5,401 acres (8.439 sq mi; 21.86 km), has a maximum length of 7.5 miles (12.1 km), mean depth of 61 feet (19 m) and a maximum depth of 135 feet (41 m). Geologists believe that it is a filled - in kettle formed from a receding glacier . </P> <P> The lake and the community of Lake Geneva were named for the town of Geneva, New York, located on Seneca Lake, which government surveyor John Brink thought it resembled . To avoid confusion with the nearby town of Geneva, Illinois, the city was renamed Lake Geneva; later the lake was renamed Geneva Lake . </P>

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