Town · Massachusetts
Cohasset, Massachusetts
Cohasset, town, in Norfolk County, Massachusetts. Cohasset had 8,461 residents on July 1, 2025 by the Census Bureau's estimate, up 0.8% since 2020; the 2020 Census counted 8,381 and the ACS 2020-2024 5-year estimates put it at 8,427 (±19). GEOID 2502114640.
Residents, July 2025 estimate
8,461
Census Bureau estimate (no margin published)
2020 Census count: 8,381 · ACS 2020-2024: 8,427 ±19
Median household income
$199,306
±$53,082 (90% margin)
Massachusetts: $103,960
Median home value
$1,318,900
±$164,968 (90% margin)
Massachusetts: $562,100
Median gross rent
$2,755
±$399 (90% margin)
Massachusetts: $1,762
Where is Cohasset and what county is it in?
Cohasset is a town in Norfolk County, Massachusetts. It covers 9.8 square miles of land, 857 residents per square mile in 2020.
Cohasset is in the Boston-Cambridge-Newton, MA-NH metropolitan statistical area, which takes in 7 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Cohasset, and is it growing?
The Census Bureau estimates that 8,461 people lived in Cohasset on July 1, 2025, up 0.8% since 2020, slower than Massachusetts (+1.7%). The 2020 Census counted 8,381 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 8,427 (±19).
| Measure | Cohasset | Norfolk County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 8,427±19 | 730,082 | −57 |
| Households | 3,037±206 | 283,368 | no clear change |
| Average household size | 2.76±0.19 | 2.51 | no clear change |
| Housing units | 3,244±223 | 295,227 | no clear change |
Cohasset's population since 2000
From 7,261 in 2000 to 8,461 in 2025: up 16.5%. The 2000, 2010 and 2020 figures are census counts, each for Cohasset as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Cohasset?
The median resident of Cohasset is 43.9 years old; 27.2% are under 18 and 17.8% are 65 or older. The largest group is non-Hispanic white residents at 92.7%, then Hispanic or Latino residents (of any race) at 4.1%. 4.5% of residents were born outside the United States.
| Measure | Cohasset | Norfolk County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 43.9±4.4 | 40.9 | no clear change |
| Under 18 years | 27.2%±3.8 pts | 20.5% | – |
| 65 years and over | 17.8%±2.7 pts | 17.8% | – |
| Male | 49.1%±2.8 pts | 48.5% | – |
| Hispanic or Latino (any race) | 4.1%±3.1 pts | 5.8% | – |
| White alone, not Hispanic | 92.7%±3.7 pts | 68.7% | no clear change |
| Black or African American alone, not Hispanic | 0.7%±0.7 pts | 7.1% | – |
| Asian alone, not Hispanic | 0.2%±0.3 pts | 12.4% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.4%±0.4 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.5 pts | 0.0% | – |
| Two or more races, not Hispanic | 1.9%±1.4 pts | 4.8% | – |
| Some other race alone, not Hispanic | 0.0%±0.5 pts | 1.1% | – |
| Born outside the United States | 4.5%±1.9 pts | 19.3% | no clear change |
| Speak a language other than English at home (age 5+) | 4.5%±2.0 pts | 23.3% | – |
| Civilian veterans (age 18+) | 5.0%±1.8 pts | 3.8% | – |
| With a disability | 7.4%±2.6 pts | 9.9% | – |
| No health insurance coverage | 2.5%±2.0 pts | 1.9% | – |
| High school graduate or higher (age 25+) | 97.8%±1.2 pts | 94.4% | – |
| Bachelor's degree or higher (age 25+) | 76.7%±4.8 pts | 58.8% | no clear change |
| Graduate or professional degree (age 25+) | 34.4%±5.3 pts | 28.4% | – |
| Lived in the same house a year earlier | 95.0%±2.1 pts | 89.2% | – |
| Moved from another state in the past year | 0.4%±0.5 pts | 2.0% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Cohasset earn?
Half of Cohasset's 3,037 households earn less than $199,306 a year (±$53,082), against $130,739 in Norfolk County and $103,960 in Massachusetts. In 2015-2019 it was $179,286 in 2024 dollars; the margins of error cannot tell the two periods apart. 3.0% of residents live below the poverty line.
| Measure | Cohasset | Norfolk County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $199,306±$53,082 | $130,739 | no clear change |
| Mean household income | $307,351±$34,166 | $183,022 | – |
| Per capita income | $113,599±$13,188 | $71,758 | no clear change |
| People below the poverty line | 3.0%±1.7 pts | 6.7% | no clear change |
| Children under 18 below the poverty line | 1.1%±1.7 pts | 5.4% | – |
| Households receiving SNAP | 2.1%±1.5 pts | 9.4% | – |
| Households with a computer | 98.7%±1.2 pts | 96.8% | – |
| Households with a broadband subscription | 97.8%±1.8 pts | 94.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Cohasset?
Owners occupy 83.0% of Cohasset's occupied homes and renters 17.0%. The median owner-occupied home is valued at $1,318,900 by its owner (±$164,968). The median renter pays $2,755 a month including utilities, and 40.6% of renters pay 35% or more of their income on rent.
| Measure | Cohasset | Norfolk County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $1,318,900±$164,968 | $683,900 | +$245,612 |
| Median gross rent | $2,755±$399 | $2,149 | +$964 |
| Renters paying 35% or more of income on rent | 40.6%±15.5 pts | 41.1% | no clear change |
| Median monthly owner costs, with a mortgage | $4,000 or more | $3,171 | – |
| Owner-occupied homes | 83.0%±4.4 pts | 68.7% | no clear change |
| Renter-occupied homes | 17.0%±4.4 pts | 31.3% | – |
| Housing units | 3,244±223 | 295,227 | no clear change |
| Homeowner vacancy rate | 0.0%±1.7 pts | 0.4% | – |
| Rental vacancy rate | 12.8%±16.2 pts | 4.0% | – |
| Single-family detached homes | 80.3%±5.1 pts | 56.6% | – |
| Mobile homes | 0.0%±1.3 pts | 0.4% | – |
| Built 2020 or later | 0.0%±1.3 pts | 1.1% | – |
| Built 2010 to 2019 | 13.2%±3.9 pts | 7.8% | – |
| Built 1939 or earlier | 28.1%±5.9 pts | 26.1% | – |
| Households with no vehicle | 3.4%±2.1 pts | 9.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Cohasset building?
Builders took permits for 11 new housing units in Cohasset in 2025 (11 in single-family houses), 1.3 per 1,000 residents against 1.7 across Massachusetts.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Cohasset work and get to work?
56.0% of Cohasset's workers drive alone and 25.7% work from home. The average trip to work takes 37.2 minutes. The unemployment rate in 2020-2024 averaged 4.6%.
| Measure | Cohasset | Norfolk County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 65.8%±4.6 pts | 69.2% | – |
| Unemployment rate | 4.6%±2.4 pts | 4.9% | – |
| Drove alone to work | 56.0%±6.3 pts | 57.4% | – |
| Carpooled | 3.6%±2.2 pts | 6.0% | – |
| Public transportation | 11.9%±5.6 pts | 8.7% | – |
| Walked | 2.2%±1.9 pts | 3.1% | – |
| Worked from home | 25.7%±5.3 pts | 22.8% | +15.3 pts |
| Mean travel time to work | 37.2 min±5.0 | 32.5 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Cohasset?
2 census tracts lie mostly in Cohasset (2020 census blocks). Their median household incomes run from $190,441 (Tract 4231.02) to $217,792 (Tract 4231.01).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 4231.02Norfolk County | 4,642 | $190,441 |
| Tract 4231.01Norfolk County | 3,785 | $217,792 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Cohasset) · Census block assignment files
How does Cohasset compare with other places in Massachusetts?
By the Census Bureau's July 2025 estimates, Cohasset is the 1,466th-most populous of the 16,079 U.S. towns and townships that have one and the 120th-most populous of 266 in Massachusetts.
Cohasset ranks 27th of 453 places in Massachusetts with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 120th | 266 |
| Growth 2020-2025 (PEP) | 190th | 292 |
| Residents per square mile | 220th | 461 |
| Median household income | 27th | 453 |
| Per capita income | 8th | 460 |
| Median home value | 10th | 459 |
| Median gross rent | 10th | 410 |
| Poverty rate | 309th | 338 |
| Bachelor's degree or higher | 29th | 459 |
| Median age | 252nd | 461 |
| Owner-occupied share | 189th | 460 |
| Work from home | 95th | 429 |
| Travel time to work | 27th | 459 |
Cohasset's figures with every place in Massachusetts (CSV)
Every place in Massachusetts, sortable · Compare Cohasset with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Cohasset?
16 of the 57 figures for Cohasset on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Cohasset are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.