Hopkinton is a town in Merrimack County, New Hampshire, United States. The population was 5,914 at the 2020 census. The town has three distinct communities: Hopkinton village, mainly a residential area in the center of the town; Contoocook, the town's business hub, located in the north; and West Hopkinton, within the more agricultural portion of the town. The town is home to the Hopkinton State Fair, adjacent to Contoocook village, and to the historic Contoocook Railroad Depot and the Contoocook Railroad Bridge, the oldest covered railroad bridge in the United States.

Merrimack County is a county in the U.S. state of New Hampshire. As of the 2020 Census, the population was 153,808, making it the third most populous county in New Hampshire. Its county seat is Concord, the state capital. The county was organized in 1823 from parts of Hillsborough and Rockingham counties, and is named for the Merrimack River. Merrimack County comprises the Concord, NH Micropolitan Statistical Area, which in turn constitutes a portion of the Boston–Worcester–Providence, MA–RI–NH–CT Combined Statistical Area. In 2010, the center of population of New Hampshire was located in Merrimack County, in the town of Pembroke.