Jonesboro, IL has a population of 2,005 and is the 11,009th largest city in the United States. The population density is 742 per sq mi which is 234% higher than the Illinois average and 720% higher than the national average. The median age in Jonesboro is 40 which is approximately 7% higher than the Illinois average of 37. In Jonesboro, 58% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 68% of Jonesboro residents were born in Illinois, 29% were born out of state, 1% were born outside of the United States and 2% were foreign born.