The Lebanon–Claremont Micropolitan Statistical Area, as defined by the United States Census Bureau, is an area consisting of four counties – two in New Hampshire and two in Vermont, anchored by the cities of Lebanon, New Hampshire and Claremont, New Hampshire. At the 2010 census, the area was defined as two separate Micropolitan Statistical Areas (μSAs), Claremont and Lebanon. The Claremont μSA, consisting of Sullivan County, New Hampshire, had a population of 43,742, while the Lebanon μSA, comprising Grafton County, New Hampshire, and Orange and Windsor counties in Vermont, had a population of 174,724. In 2013, the two areas were combined to form the Claremont-Lebanon μSA, and in 2015 the estimated population was 216,923. The Claremont–Lebanon μSA is the most populous micropolitan area in the United States.

Sullivan County is a county in the U.S. state of New Hampshire. As of the 2020 census, the population was 43,063, making it the second-least populous county in New Hampshire. Its county seat is Newport.