The real Attleboro Attleboro is a city in Bristol County, Massachusetts, United States. It was once known as "The Jewelry Capital of the World" for its many jewelry manufacturers. According to the 2010 census, Attleboro had a population of 43,593 in 2010.In 1634, English settlers first arrived in the territory that is now Attleboro.[2] It was later incorporated from Rehoboth in 1694 as the town of Attleborough.[3] It included the towns of Cumberland, Rhode Island, until 1747 and North Attleborough, Massachusetts, until 1887. The town was reincorporated in 1914 as the City of Attleboro, with the "-ugh" removed from the name, although North Attleborough kept it. Like many towns in Massachusetts, it was named for a British town.