Clarksville, AR has a population of 9,391 and is the 4,130th largest city in the United States. The population density is 507 per sq mi which is 815% higher than the Arkansas average and 460% higher than the national average. The median age in Clarksville is 35 which is approximately 7% lower than the Arkansas average of 38. In Clarksville, 56% of the population over 15 years of age are married, 80% speak English and 17% speak Spanish. 55% of Clarksville residents were born in Arkansas, 31% were born out of state, 1% were born outside of the United States and 13% were foreign born.