About the town » Marlborough, Middlesex County, Massachusetts, United States

Marlborough (often spelled Marlboro) is a city in Middlesex County, Massachusetts, United States. The population was 38,499 at the 2010 census. Marlborough became a prosperous industrial town in the 19th century and made the transition to high technology industry in the late 20th century after the construction of the Massachusetts Turnpike. Marlborough was declared a town in 1660. It later became a city because of the population size.