Jonesborough, TN has a population of 5,234 and is the 6,255th largest city in the United States. The population density is 1,016 per sq mi which is 564% higher than the Tennessee average and 1022% higher than the national average. The median age in Jonesborough is 40 which is approximately 4% higher than the Tennessee average of 39. In Jonesborough, 59% of the population over 15 years of age are married, 96% speak English and 3% speak Spanish. 57% of Jonesborough residents were born in Tennessee, 40% were born out of state, 0% were born outside of the United States and 2% were foreign born.