Southborough is an affluent town in Worcester County, Massachusetts, United States. It incorporates the smaller villages of Cordaville, Fayville, and Southville. Its name is often informally shortened to Southboro, a usage seen on many area signs and maps, though officially rejected by town ordinance. Its population was 9,767 at the 2010 census, in nearly 3,000 households.
First settled in 1660, land use now is primarily residential, with substantial open space. A tenth of the town's area is flooded by the Sudbury Reservoir. Light industrial land use is concentrated along main roads, primarily Massachusetts Route 9, and there are several small business districts in the villages and along Route 9. Southborough was named Number 31 in the nation on CNN Money's "100 Best Places to Live" in 2009.
Southborough was first settled in 1660 and was officially incorporated in July 1727. Southborough was primarily a farming community until mills began to tap the small rivers that ran through the town. By the end of the 19th century, Southborough was home to the manufacture of plasters, straw bonnets, boots, and shoes, among other things.
In 1898 the Fayville Dam was constructed to produce several reservoirs to supply a growing Boston with water. As a result, manufacturing vanished, and Southborough did not see substantial growth until the high-tech boom of the 1970s.
The Fay, Burnett, and Choate families along with hundreds of others had a major impact on the development of the town as it is known today. Buildings such as St. Mark's Church, St. Mark's School, the Library, and the Community House and the Fay School were all derived from or were direct products of these families.