Geneva, Lake, resort lake, Walworth co., SE Wis., near Ill. state line; c.8 mi/12.9 km long, c.1 mi/1.6 km wide. Lake Geneva city, on NE shore, is largest resort; others are Fontana at W end and Williams Bay on N shore. Fishing, year-round lake sports. Drained by White R. Big Foot Beach State Park at E end.