Sister cities of Southborough, Massachusetts

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 quarter 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.