Mount Juliet, TN has a population of 29,853 and is the 1,434th largest city in the United States. The population density is 1,206 per sq mi which is 688% higher than the Tennessee average and 1231% higher than the national average. The median age in Mount Juliet is 36 which is approximately 7% lower than the Tennessee average of 39. In Mount Juliet, 63% of the population over 15 years of age are married, 92% speak English and 2% speak Spanish. 48% of Mount Juliet residents were born in Tennessee, 44% were born out of state, 1% were born outside of the United States and 7% were foreign born.