Population of Marlborough, Massachusetts as of January 2026. How many people live in Marlborough today?

The exact population of Marlborough, Massachusetts as of January 2026 is estimated at 41,793 residents. Please note: this figure is an estimate and may slightly change as people get born and pass away, it also depends on migration to/from Marlborough.

Check out more data on population in Massachusetts:

• Population of Lynn
• Population of Framingham
• Population of Chicopee
• Population of Barnstable
• Population of Pittsfield
• Population of Braintree
• Population of Andover
• Population of Lexington
• Population of Needham
• Population of Milford
• Population of Stoughton
• Population of Milton
• Population of Burlington
• Population of Reading
• Population of Acton
• Population of Winchester
• Population of Sandwich