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".

Calumet County is a county located in the U.S. state of Wisconsin. As of the 2020 census, the population was 52,442. The county seat is Chilton. The county was created in 1836 and organized in 1850.