Marlborough Flag

Marlborough

County Seat:
No
Area (mi²):
20.864
State:
Massachusetts

Marlborough is a city located in Middlesex County, Massachusetts. Marlborough has a 2026 population of 42,169. Marlborough is currently growing at a rate of 0.92% annually and its population has increased by 1.16% since the most recent census, which recorded a population of 41,685 in 2020.

42.2K
Total Population
2,021
Density (mi²)
385 0.92%
Growth

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)