Chart of Cerro Gordo County, Iowa communities by population (2010)

† county seat

Reference 1: Population (2010 Census).

Reference 2: † Mason City, Clear Lake, Nora Springs (mostly in Floyd County), Rockwell, Ventura, Thornton, Plymouth, Meservey, Swaledale, Rock Falls, Dougherty, Burchinal and Portland.

Source: http://en.wikipedia.org/wiki/Cerro_Gordo_County,_Iowa