Winchendon is a town in Worcester County, Massachusetts, United States. The population was 10,300 at the 2010 census. The town includes the villages of Waterville and Winchendon Springs (also known as Spring Village). A census-designated place, also named Winchendon, is defined within the town for statistical purposes. The Winchendon State Forest, a 174.5 acres (70.62 hectares) parcel, is located within the township as is Otter River State Forest; both recreational areas are managed by the Massachusetts Department of Conservation and Recreation.
Winchendon is a small town in north-central Massachusetts, originally the country of the Pennacook Indians, and then the Nipnet/Nipmuck tribe.
The House of Representatives made the grant of New Ipswich Canada, now Winchendon, on June 10, 1735, in answer to a petition from Lt. Abraham Tilton of Ipswich. The petition was on behalf of veterans or surviving heirs participating in the 1690 expeditions against Canada. Winchendon was officially incorporated in 1764, named after Nether Winchendon, Buckinghamshire, England, which itself was the site of land owned by Governor Francis Bernard, who signed the town's incorporation into law.