Clarksville is located in northeast Iowa. Clarksville is between the Butler, Floyd county. Clarksville has 1.33 square miles of land area and 0.04 square miles of water area. As of 2010-2014, the total Clarksville population is 1,388, which has shrunk 3.68% since 2000. The population growth rate is much lower than the state average rate of 5.19% and is much lower than the national average rate of 11.61%. Clarksville median household income is $43,833 in 2010-2014 and has grown by 33.41% since 2000. The income growth rate is about the same as the state average rate of 33.56% and is higher than the national average rate of 27.36%. Clarksville median house value is $89,400 in 2010-2014 and has grown by 71.26% since 2000. The house value growth rate is higher than the state average rate of 53.09% and is much higher than the national average rate of 46.91%. As a reference, the national Consumer Price Index (CPI) inflation rate for the same period is 26.63%. On average, the public school district that covers Clarksville is much better than the state average in quality. The Clarksville area code is 319.