Kiel is a city in Calumet and Manitowoc counties in the U.S. state of Wisconsin. The population was 3,738 at the 2010 census. Of this, 3,429 residents lived in Manitowoc County, and 309 residents lived in Calumet County. The city is located primarily within Manitowoc County, though a portion extends west into adjacent Calumet County and is known as "Hinzeville".
It was once known as the Wooden Shoes Capital of Wisconsin as it held the only wooden shoes factory in Wisconsin.