There are 34 US Post Offices in Grafton County serving a total of 85,891 residents equating to 2,526 residents per post office. It's estimated that approximately 137,092 packages are handled across the 34 county post offices annually. Grafton County is a county located in the state of New Hampshire, in the United States. As of the 2010 census, the population was 89,118. Its county seat is North Haverhill, which is a village within the town of Haverhill. Until 1972, the county courthouse and other offices were located in downtown Woodsville, a larger village within the town of Haverhill. Grafton County is part of the Claremont-Lebanon, NH\u2013VT Micropolitan Statistical Area. The county is the home of Dartmouth College and Plymouth State University. Progressive Farmer rated Grafton County fourth in its list of the \"Best Places to Live in Rural America\" in 2006, citing low unemployment (despite slow economic growth), a favorable cost of living, and the presence of White Mountain National Forest, the state's only national forest."