Lebanon, TN has a population of 29,439 and is the 1,454th largest city in the United States. The population density is 766 per sq mi which is 401% higher than the Tennessee average and 746% higher than the national average. The median age in Lebanon is 36 which is approximately 7% lower than the Tennessee average of 39. In Lebanon, 54% of the population over 15 years of age are married, 94% speak English and 4% speak Spanish. 62% of Lebanon residents were born in Tennessee, 33% were born out of state, 0% were born outside of the United States and 5% were foreign born.