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is a town in Grafton County, New Hampshire, United States. The population was 4,416 at the 2000 census. Haverhill includes the villages of Woodsville, Pike, North Haverhill and the district of Mountain Lakes. Located here are Bedell Bridge State Park, Black Mountain State Forest, Kinder Memorial Forest, and Oliverian Valley Wildlife Preserve. It is home to the annual North Haverhill Fair, and to a branch of the New Hampshire Community Technical Colleges. The village of North Haverhill is county seat of Grafton County.
Settled by citizens from Haverhill, Massachusetts, the town was first known as Lower Cohos. It was incorporated in 1763 by Colonial Governor Benning Wentworth, and in 1773, became the county seat of Grafton County. Haverhill was the terminus of the old Province Road, which connected the northern and western settlements with the seacoast. By 1859, when the town had 2,405 inhabitants, industries included 3 gristmills, 12 sawmills, a paper mill, a large tannery, a carriage manufacturer, an iron foundry, 7 shoe factories, a printing office, and several mechanic shops. The town is home to the oldest documented covered bridge in the country still standing -- the Haverhill-Bath Bridge, built in 1829.
The village of Woodsville, named for John L. Woods of Wells River, Vermont, was once a very important railroad center. Woods operated a sawmill on the Ammonoosuc River, and developed a railroad supply enterprise following the establishment of the Boston, Concord & Montreal Railroad. The village of Pike was settled by future employees of the Pike Manufacturing Company, which was once the world's leading manufacturer of whetstones.
Woodsville served as the county seat until 1972, when Grafton County administrative offices moved to rural land halfway between Woodsville and the smaller village of North Haverhill.