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. Calumet County is included in the Appleton, WI Metropolitan Statistical Area as well as the Appleton-Oshkosh-Neenah, WI Combined Statistical Area. The Holyland is partially located in southern Calumet County.