Lebanon, PA has a population of 25,654 and is the 1,680th largest city in the United States. The population density is 6,156 per sq mi which is 2121% higher than the Pennsylvania average and 6695% higher than the national average. The median age in Lebanon is 34 which is approximately 15% lower than the Pennsylvania average of 41. In Lebanon, 41% of the population over 15 years of age are married, 70% speak English and 28% speak Spanish. 63% of Lebanon residents were born in Pennsylvania, 13% were born out of state, 16% were born outside of the United States and 8% were foreign born.