Lebanon locally is a city in Grafton County, New Hampshire, United States. The population was 13,151 at the 2010 census and an estimated 13,522 as of 2017. 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.
Together with Hanover, New Hampshire, and White River Junction, Vermont, Lebanon today is at the center of a Micropolitan Statistical Area, encompassing nearly 30 towns along the upper Connecticut River valley.