Lebanon is a city in Warren County, Ohio, United States. The population was 16,962 at the 2000 census. It is the county seat of Warren County. It was named after the Biblical Lebanon because of the many juniper or Eastern Redcedar trees there, similar to the Lebanon Cedar. It is known today as 'The Cedar City'. Lebanon apartments for rent comparison page shows most up to date rent information on Lebanon apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.