Clarkton, MO has a population of 1,283 and is the 13,626th largest city in the United States. The population density is 1,136 per sq mi which is 1215% higher than the Missouri average and 1154% higher than the national average. The median age in Clarkton is 30 which is approximately 22% lower than the Missouri average of 38. In Clarkton, 58% of the population over 15 years of age are married, 88% speak English and 11% speak Spanish. 75% of Clarkton residents were born in Missouri, 20% were born out of state, 0% were born outside of the United States and 4% were foreign born.