Suffolk County, Massachusetts Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 4th-largest in Massachusetts
The population of Suffolk County, Massachusetts is 782,172 as of the 2023 American Community Survey, making it the 4th-largest county in Massachusetts. The median household income is $92,859, the median home value is $680,700, and the median age is 33.8.
The population of Suffolk County has grown 9.3% since 2010 (725,786 → 793,144), a +0.64% annualized rate.
782,172
Population
+0.64%
Annual growth
13426
People / sq mi
$92,859
Median Income
$680,700
Median Home Value
Suffolk County covers 58 sq mi of land at 13426.2 people per square mile.
About Suffolk County, MA
Suffolk County stands apart on settlement density — it is among the most densely settled of US counties, at roughly 13,426 people per square mile. With 782,172 residents, Suffolk County is a county in Massachusetts. That makes it one of the ten largest counties in Massachusetts in the country, at #4 by population.
Households here are among the highest-earning of all US counties: median income is $92,859, above the US median of $78,538. The poverty rate is 11.6%, below the national 12.4%. Real estate commands a premium here — a median home value of $680,700, with typical rent around $2,069.
The population is unusually well-credentialed for US counties — 49.9% of adults have a four-year degree, above the national 35.0%. Working from home is common here: 17.5% of workers do so, above the national 14.0%, and the average commute runs about 31 minutes each way.
That density explains much of the rest of the profile in Suffolk County: denser places lean toward renting, shorter commutes by transit, and a younger working-age mix.
Suffolk County Population History (2010-2024)
The county of Suffolk County had a population of 725,786 in 2010 and 793,144 in 2024, a 9.3% growth over 14 years. The peak was 805,915 in 2019. Average annual growth rate: 0.64%.
793,144
Population (2024)
725,786
Population (2010)
805,915
Peak (2019)
0.64%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 725,786 |
| 2011 | 737,285 |
| 2012 | 751,371 |
| 2013 | 762,863 |
| 2014 | 774,113 |
| 2015 | 783,177 |
| 2016 | 793,020 |
| 2017 | 801,269 |
| 2018 | 804,023 |
| 2019 | 805,915 |
| 2020 | 797,239 |
| 2021 | 776,280 |
| 2022 | 777,266 |
| 2023 | 781,678 |
| 2024 | 793,144 |
Race & Ethnicity
| White | 48.1% |
| Black or African American | 19.1% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.3% |
| Two or More Races | 0.0% |
Age & Sex
33.8
Median Age
51.7%
Female
48.3%
Male
13.0%
Age 65+
Age Distribution
Children (under 15): 13.6% · Seniors (65+): 13.0%
Income & Poverty
| Median household income | $92,859$-8,482 vs state |
| Mean household income | $136,155 |
| Per-capita income | $56,920 |
| Poverty rate | 11.6%+5.0% vs state |
| Unemployment rate | 4.4% |
| Employment-to-population | 65.8% |
Top Industries by Employment
The largest employment sector in Suffolk County is professional & business services, accounting for 29.8% of workers.
How residents commute
23.6%
Drive alone
12.3%
Carpool
36.6%
Public transit
17.5%
Work from home
30.9 min
Avg commute
Housing
$680,700+$154,900 vs state
Median home value
$2,069
Median rent
36.6%
Homeownership rate
353,930
Total housing units
91.0%
Occupied
9.0%
Vacant
63.4%
Renter-occupied
Social & access
96.7%
With health insurance
94.6%
With broadband internet
23.6%
Foreign-born
2.3%
Veterans (18+)
12.3%
With a disability
61.6%
Speak language other than English at home
Education
87.6%
High School+
49.9%
Bachelor's+
Largest cities in Massachusetts
Other counties in Massachusetts
Part of Massachusetts
Metro areas in Massachusetts
County rankings
Common questions about Suffolk County, MA
Frequently Asked Questions
Suffolk County, Massachusetts has a population of 782,172 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 4th-largest county in Massachusetts. Population density is 13426 people per square mile.
The population of Suffolk County has grown 9.3% since 2010 (725,786 → 793,144), a +0.64% annualized rate.
The median household income in Suffolk County, Massachusetts is $92,859, with mean (average) household income of $136,155 and per-capita income of $56,920. 11.6% of residents live below the federal poverty level.
In Suffolk County, the largest racial and ethnic groups are White (48.1%), Black or African American (19.1%), Hispanic or Latino (1.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Suffolk County, Massachusetts is 33.8 years. Residents are 51.7% female and 48.3% male.
The median home value in Suffolk County is $680,700 and median monthly rent is $2,069. 36.6% of occupied housing units are owner-occupied. The county has 353,930 total housing units, 9.0% of which are vacant.
The largest employment sector in Suffolk County, Massachusetts is professional, scientific, and management services, employing 29.8% of workers. The unemployment rate is 4.4%.
Boston is among the largest cities associated with Suffolk County, Massachusetts, with a population of 663,972.
Suffolk County, MA Climate
Suffolk County, MA has an average annual temperature of 10.3°C (51°F) and receives about 1121 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
10.3°C
Avg Temp
1121
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -2° / 28° | 101 mm |
| February | -1° / 30° | 86 mm |
| March | 3° / 38° | 102 mm |
| April | 9° / 47° | 95 mm |
| May | 15° / 58° | 85 mm |
| June | 20° / 67° | 87 mm |
| July | 23° / 73° | 82 mm |
| August | 22° / 72° | 91 mm |
| September | 18° / 64° | 91 mm |
| October | 12° / 53° | 97 mm |
| November | 6° / 43° | 104 mm |
| December | 0° / 33° | 100 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Suffolk County, MA
The most comfortable months to visit Suffolk County, MA are typically June, August and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -7°C low). November is usually the wettest month.
Where to stay near Suffolk County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.