Clarksville is a city in Butler County, Iowa, United States, along the Shell Rock River.

There were 578 housing units at an average density of 441.7 per square mile (170.5/km2).

There were 619 housing units at an average density of 465.4 per square mile (179.7/km2).

25.5% of all households were made up of individuals, and 12.6% had someone living alone who was 65 years of age or older.

There were 611 housing units at an average density of 447.8 per square mile (172.9/km2).

28.7% of all households were made up of individuals, and 17.7% had someone living alone who was 65 years of age or older.

[11] Jeffrey John Downs, participant on season one of A&E's 60 Days In, is a native of Clarksville.

[12] He also appeared on season one of BYUtv's Relative Race with his wife Emily.

[13] Clarksville native Maddie Poppe won season 16 of American Idol in 2018.