Newbury is a town in Merrimack County, New Hampshire, United States. The population was 2,072 at the 2010 census. Newbury is home to part of Lake Sunapee, including Mount Sunapee State Park Beach. Mount Sunapee Resort, a ski area in Mount Sunapee State Park, is in the west. The town includes the villages of Blodgett Landing and South Newbury.