Chart of Black Hawk County, Iowa communities by population (2010)

† county seat

Reference 1: Population (2010 Census).

Reference 2: † Waterloo, Cedar Falls, Evansdale, Jesup (mostly in Buchanan County), La Porte City, Hudson, Elk Run Heights, Janesville (mostly in Bremer County), Washburn, Dunkerton, Raymond and Gilbertville.

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