Ossipee is a town in Carroll County, New Hampshire, United States. The population was 4,345 at the 2010 census. It is the county seat of Carroll County. Ossipee, which includes several villages, is a resort area and home to part of Pine River State Forest.

Originally known as Wigwam Village, and then New Garden, the town was named for the Ossipee Indians, one of the twelve Algonquian tribes. It was once the site of an Indian fort, designed to protect the tribe from the Mohawks in the west. In 1725, the Indian stockade was destroyed, and then rebuilt by Captain John Lovewell. The new fort was one of the largest in New England. The fort was located where the second green of Indian Mound Golf now is. Wood, ramrods and the brass bolt used for the gate were discovered when the course was built. On February 22, 1785, the legislature incorporated Ossipee as a town.

Although the surface of the town is "rough and uneven, and in some parts rocky and mountainous," farmers found it suitable for pasturage, as well as for cultivating wheat and potatoes. Principal goods were produce, lumber and cattle. In 1859, when the population was 2,123, Ossipee contained twelve sawmills, five gristmills, twelve clapboard and shingle mills, one bedstead factory, one door factory, a sash and blind factory, one paper mill and four tanneries. The Portsmouth, Great Falls & Conway Railroad in 1871 reached Ossipee Corner, with service extended in 1875 to Center Ossipee. The trains brought commerce and tourists, helping the town develop as a summer resort. Railroad service, however, would be discontinued in 1961 for passengers, and in 1972 for freight.

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