Alstead is a town in Cheshire County, New Hampshire, United States. The population was 1,864 at the 2020 census. Alstead is home to Feuer State Forest. The town was chartered by Massachusetts Governor Jonathan Belcher in 1735 as one in a line of nine forts intended to protect southwestern New Hampshire from Indian attack. It was granted as "…Alstead is a town in Cheshire County, New Hampshire, United States. The population was 1,864 at the 2020 census. Alstead is home to Feuer State Forest. The town was chartered by Massachusetts Governor Jonathan Belcher in 1735 as one in a line of nine forts intended to protect southwestern New Hampshire from Indian attack. It was granted as "Newton" or "Newtown" in 1752 by Governor Benning Wentworth, but would be incorporated in 1763 as Alstead. It was named for Johann Heinrich Alsted, who compiled an early encyclopedia that was popular at Harvard College. Settled about 1764, Alstead would be one of the towns that wavered in its allegiance after the Revolutionary War. It decided to join Vermont in April 1781, but at the insistence of George Washington, returned to New Hampshire authority early the next year.