Plymouth Regional High School includes students from a town in Grafton County, New Hampshire that had a population of 247 in what census year?
Waterville Valley, New Hampshire Waterville Valley is a town in Grafton County, New Hampshire, United States. The population was 247 at the 2010 census.
Dover, New Hampshire Dover is a city in Strafford County, New Hampshire, United States. The population was 29,987 at the 2010 census, the largest in the New Hampshire Seacoast region. The population was estimated at 31,153 in 2016. It is the county seat of Strafford County, and home to Wentworth-Douglass Hospital, the Woodman Institute Museum, and the Children's Museum of New Hampshire.