For the Lake of Clear Lake, see Clear Lake. Clear Lake is a city in Cerro Gordo County, Iowa, United States. The population was 7,777 at the 2010 census. The city is named for the large lake on which it is located. It is the home of a number of marinas, state parks and tourism-related businesses. Clear Lake is also a major stop on Interstate 35 with many restaurants, hotels and truck stops.

Clear Lake is the name of a natural spring fed body of water located in Cerro Gordo County, Iowa near Clear Lake, Iowa. It is approximately in size. It is a popular fishing destination, with walleye, bullhead, yellow bass and channel catfish. People from Des Moines and Minneapolis–Saint Paul have had homes on the shores of the lake since the 1870s. The average depth is and the maximum depth is , in the dredged area of the west end. The lake has of shoreline. As of 2004, the lake has seen major efforts undergone to restore its natural clarity, including filtration systems, dredging, and education of local farmers to reduce toxic pesticides from entering the lake. Clear Lake has been named the "Best Iowa Lake Town" by The Des Moines Register and "A Top Vacation Spot" by Midwest Living magazine.