Jonestown, MS has a population of 1,427 and is the 12,989th largest city in the United States. The population density is 3,684 per sq mi which is 5656% higher than the Mississippi average and 3966% higher than the national average. The median age in Jonestown is 27 which is approximately 26% lower than the Mississippi average of 37. In Jonestown, 37% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 89% of Jonestown residents were born in Mississippi, 11% were born out of state, 0% were born outside of the United States and 0% were foreign born.