Marianna, AR has a population of 3,840 and is the 7,629th largest city in the United States. The population density is 1,063 per sq mi which is 1816% higher than the Arkansas average and 1073% higher than the national average. The median age in Marianna is 34 which is approximately 10% lower than the Arkansas average of 38. In Marianna, 46% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 78% of Marianna residents were born in Arkansas, 22% were born out of state, 0% were born outside of the United States and 0% were foreign born.