Westborough is a town in Worcester County, Massachusetts, United States. The population was 18,272 at the 2010 census. The town is governed under the New England open town meeting system, headed by a five member elected Board of Selectmen whose duties include licensing, appointing various administrative positions, and calling a town meeting of citizens annually and whenever the need arises.
Before recorded time, the area now known as Westborough was a well travelled crossroads. As early as 7,000 B.C., prehistoric people in dugout canoes followed the Sudbury and Assabet Rivers to their headwaters in search of quartzite for tools and weapons. During the period from 1200-1600 A.D., seasonal migrations brought Nipmuc Indians to hunt and fish near Cedar Swamp and Lake Hoccomocco. Using Fay Mountain as a landmark, Indians crisscrossed Westborough on well worn paths: the old Connecticut Path leading west from Massachusetts Bay; the Narragansett Trail leading south, and the trail (along the present Milk Street) leading to Canada.
The early English explorer John Oldham followed these trails through Westborough in 1633, and settlers in search of fertile farmlands followed not long after. By late 1675, a few families had settled near Lake Chauncy, in the "west borough" of Marlborough.