Population of Watertown, Massachusetts as of March 2025. How many people live in Watertown today?

The exact population of Watertown, Massachusetts as of March 2025 is estimated at 35,329 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 Watertown.

Check out more data on population in Massachusetts:

• Population of Boston
• Population of Worcester
• Population of Springfield
• Population of Somerville
• Population of Malden
• Population of Revere
• Population of Arlington
• Population of Fitchburg
• Population of Shrewsbury
• Population of Franklin
• Population of North Attleborough
• Population of Melrose
• Population of West Springfield
• Population of Belmont
• Population of Easton
• Population of Westford
• Population of Wilmington