Clintonville is a city in Waupaca County, Wisconsin, United States. The population was 4,591 at the 2020 census. The area that became Clintonville was first settled in March, 1855.

Waupaca County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 51,812. The county seat is Waupaca. The county was created in 1851 and organized in 1853. It is named after the Waupaca River, a Menominee language name meaning 'white sand bottom', 'pale water', or 'tomorrow river'.