Jacksonville, AR has a population of 28,661 and is the 1,496th largest city in the United States. The population density is 1,003 per sq mi which is 1709% higher than the Arkansas average and 1007% higher than the national average. The median age in Jacksonville is 32 which is approximately 15% lower than the Arkansas average of 38. In Jacksonville, 51% of the population over 15 years of age are married, 94% speak English and 4% speak Spanish. 54% of Jacksonville residents were born in Arkansas, 40% were born out of state, 2% were born outside of the United States and 4% were foreign born.