Lebanon is a city in Grafton County, New Hampshire, USA. The population was 12,568 at the 2000 census. Lebanon is located in western New Hampshire, south of Hanover, near the Connecticut River. It is the home to Dartmouth-Hitchcock Medical Center and Dartmouth Medical School, together comprising the largest medical facility between Boston, Massachusetts and Burlington, Vermont. 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.