Jonestown, TX has a population of 1,740 and is the 11,847th largest city in the United States. The population density is 277 per sq mi which is 185% higher than the Texas average and 205% higher than the national average. The median age in Jonestown is 49 which is approximately 42% higher than the Texas average of 34. In Jonestown, 58% of the population over 15 years of age are married, 86% speak English and 13% speak Spanish. 50% of Jonestown residents were born in Texas, 41% were born out of state, 1% were born outside of the United States and 7% were foreign born.