Mount Lebanon, LA has a population of 41 and is the 28,358th largest city in the United States. The population density is 10 per sq mi which is 89% lower than the Louisiana average and 89% lower than the national average. The median age in Mount Lebanon is 54 which is approximately 48% higher than the Louisiana average of 36. In Mount Lebanon, 89% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 80% of Mount Lebanon residents were born in Louisiana, 20% were born out of state, 0% were born outside of the United States and 0% were foreign born.