How many people live in Suffolk County, MA?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 793,100 people living in Suffolk County, MA. That makes Suffolk County the fourth-most populous county in Massachusetts. It is home to 11.1% of people living in the state.
793K
population of Suffolk County, MA (2024)
11.1%
County share of the Massachusetts population (2024)
About 793,100 people lived in Suffolk County, MA in 2024.
Population estimates, 2000–2024
What are Suffolk County, MA’s age demographics?
About 110,300 Suffolk County, MA residents are aged 65 and older in 2024. That represents 13.9% of its population. For comparison, the age group represents 18.7% of Massachusetts' population and 18% in the US overall.
Another 125,200 Suffolk County residents, or 15.8% of the population, were children under 18. For comparison, the age group represents 19% of Massachusetts’s population and 21.6% in the US overall.
A higher share of Suffolk County, MA's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are Suffolk County, MA’s racial and ethnic demographics?
Hispanic residents make up 24.1% of the Suffolk County, MA population, higher than the national share of 20%. Suffolk County, MA also has a larger share of people identifying as non-Hispanic Black or African American (18.9%) than the US overall (12.6%).
In contrast, Suffolk County’s non-Hispanic white population accounts for 44.2%, below the 57.5% nationwide, and the non-Hispanic American Indian and Alaska Native population makes up 0.17% of the county, compared with 0.72% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Suffolk County, MA has a higher share of a non-Hispanic Black or African American population than Massachusetts as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Suffolk County, MA is Boston with about 673,500 residents in 2024.
Cities and towns in Suffolk County, MA ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Boston | 673,458 |
| 2. | Revere | 60,702 |
| 3. | Chelsea | 40,245 |
| 4. | Winthrop Town | 18,739 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
