Clarksville is a city in Butler County, Iowa, United States, along the Shell Rock River. The population was 1,264 at the 2020 census.
Downtown Clarksville
Butler County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 14,334. Its county seat is Allison. The county was organized in 1854 and named for General William O. Butler.
Butler County Courthouse