Census-designated place · Massachusetts
Williamstown CDP, Massachusetts
Williamstown CDP, census-designated place, in Berkshire County, Massachusetts. Williamstown CDP had 4,308 residents in the 2020 Census, a full count; the ACS 2020-2024 5-year estimates put it at 5,070 (±484). GEOID 2579950.
Residents, 2020 Census
4,308
Census count or controlled total
ACS 2020-2024 estimate: 5,070 ±484
Median household income
$97,917
±$36,880 (90% margin)
Massachusetts: $103,960
Median home value
$439,300
±$75,523 (90% margin)
Massachusetts: $562,100
Median gross rent
$1,424
±$364 (90% margin)
Massachusetts: $1,762
Where is Williamstown CDP and what county is it in?
Williamstown CDP is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Berkshire County, Massachusetts. It covers 3.4 square miles of land, 1,268 residents per square mile in 2020.
Williamstown CDP is in the Pittsfield, MA metropolitan statistical area (Census Bureau delineation, July 2023).
Williamstown CDP lies entirely within Williamstown, a town with its own local government (2020 census blocks).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Williamstown CDP, and is it growing?
The 2020 Census counted 4,308 residents in Williamstown CDP, a full count rather than a sample. The 2020-2024 American Community Survey, a sample, estimates 5,070 (±484).
The Census Bureau publishes yearly population estimates for incorporated places only; Williamstown CDP is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Williamstown CDP | Berkshire County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 5,070 ±484 | 129,430 | +564 |
| Households | 1,534 ±189 | 57,585 | +477 |
| Average household size | 1.98 ±0.27 | 2.14 | no clear change |
| Housing units | 1,754 ±207 | 70,004 | +308 |
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 Williamstown CDP?
The median resident of Williamstown CDP is 21.9 years old; 12.9% are under 18 and 15.1% are 65 or older. The largest group is non-Hispanic white residents at 71.6%, then non-Hispanic Asian residents at 7.7%. 11.4% of residents were born outside the United States.
| Measure | Williamstown CDP | Berkshire County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 21.9 ±0.7 | 47.3 | no clear change |
| Under 18 years | 12.9% ±5.2 pts | 16.0% | – |
| 65 years and over | 15.1% ±3.6 pts | 25.0% | – |
| Male | 44.6% ±5.1 pts | 49.0% | – |
| Hispanic or Latino (any race) | 6.3% ±2.4 pts | 5.9% | no clear change |
| White alone, not Hispanic | 71.6% ±4.6 pts | 84.8% | no clear change |
| Black or African American alone, not Hispanic | 5.5% ±3.2 pts | 2.6% | no clear change |
| Asian alone, not Hispanic | 7.7% ±2.3 pts | 1.9% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.8 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.8 pts | 0.0% | – |
| Two or more races, not Hispanic | 7.5% ±3.4 pts | 4.3% | – |
| Some other race alone, not Hispanic | 1.6% ±1.1 pts | 0.4% | – |
| Born outside the United States | 11.4% ±3.2 pts | 6.2% | no clear change |
| Speak a language other than English at home (age 5+) | 17.7% ±4.0 pts | 8.1% | – |
| Civilian veterans (age 18+) | 2.4% ±2.0 pts | 5.9% | – |
| With a disability | 12.0% ±3.8 pts | 16.0% | – |
| No health insurance coverage | 0.9% ±0.7 pts | 1.7% | – |
| High school graduate or higher (age 25+) | 98.6% ±2.3 pts | 94.1% | – |
| Bachelor's degree or higher (age 25+) | 75.4% ±9.1 pts | 40.0% | no clear change |
| Graduate or professional degree (age 25+) | 54.3% ±9.1 pts | 18.7% | – |
| Lived in the same house a year earlier | 65.8% ±7.2 pts | 88.7% | – |
| Moved from another state in the past year | 10.6% ±3.2 pts | 3.5% | – |
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 Williamstown CDP earn?
Half of Williamstown CDP's 1,534 households earn less than $97,917 a year (±$36,880), against $76,013 in Berkshire County and $103,960 in Massachusetts. In 2015-2019 it was $102,045 in 2024 dollars; the margins of error cannot tell the two periods apart. 18.0% of residents live below the poverty line.
| Measure | Williamstown CDP | Berkshire County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $97,917 ±$36,880 | $76,013 | no clear change |
| Mean household income | $160,463 ±$53,622 | $108,456 | – |
| Per capita income | $49,390 ±$16,491 | $49,365 | no clear change |
| People below the poverty line | 18.0% ±8.5 pts | 11.4% | – |
| Children under 18 below the poverty line | 5.5% ±7.5 pts | 16.0% | – |
| Households receiving SNAP | 6.3% ±4.7 pts | 16.5% | – |
| Households with a computer | 99.3% ±1.2 pts | 94.3% | – |
| Households with a broadband subscription | 91.0% ±6.7 pts | 90.3% | – |
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 Williamstown CDP?
Owners occupy 61.5% of Williamstown CDP's occupied homes and renters 38.5%. The median owner-occupied home is valued at $439,300 by its owner (±$75,523). The median renter pays $1,424 a month including utilities, and 39.2% of renters pay 35% or more of their income on rent.
| Measure | Williamstown CDP | Berkshire County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $439,300 ±$75,523 | $305,400 | no clear change |
| Median gross rent | $1,424 ±$364 | $1,097 | no clear change |
| Renters paying 35% or more of income on rent | 39.2% ±14.8 pts | 43.6% | no clear change |
| Median monthly owner costs, with a mortgage | $2,373 ±$330 | $1,816 | – |
| Owner-occupied homes | 61.5% ±10.0 pts | 69.9% | no clear change |
| Renter-occupied homes | 38.5% ±10.0 pts | 30.1% | – |
| Housing units | 1,754 ±207 | 70,004 | +308 |
| Homeowner vacancy rate | 1.9% ±1.7 pts | 0.6% | – |
| Rental vacancy rate | 0.0% ±6.9 pts | 3.0% | – |
| Single-family detached homes | 49.4% ±9.4 pts | 65.6% | – |
| Mobile homes | 0.0% ±2.4 pts | 1.4% | – |
| Built 2020 or later | 2.6% ±3.3 pts | 0.6% | – |
| Built 2010 to 2019 | 5.5% ±3.9 pts | 2.6% | – |
| Built 1939 or earlier | 40.4% ±8.5 pts | 35.5% | – |
| Households with no vehicle | 16.9% ±8.3 pts | 9.6% | – |
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 do people in Williamstown CDP work and get to work?
31.0% of Williamstown CDP's workers drive alone and 22.4% work from home. The average trip to work takes 11.7 minutes.
| Measure | Williamstown CDP | Berkshire County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 55.8% ±4.7 pts | 60.5% | – |
| Unemployment rate | 1.7% ±1.5 pts | 5.4% | – |
| Drove alone to work | 31.0% ±8.0 pts | 71.2% | – |
| Carpooled | 3.2% ±3.8 pts | 7.1% | – |
| Public transportation | 1.1% ±1.8 pts | 1.5% | – |
| Walked | 39.0% ±7.4 pts | 4.8% | – |
| Worked from home | 22.4% ±6.1 pts | 14.2% | +18.1 pts |
| Mean travel time to work | 11.7 min ±2.3 | 21.2 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 Williamstown CDP?
1 census tract lies mostly in Williamstown CDP, and 1 more reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9201.01Berkshire County | 5,639 | $87,005 |
| Tract 9201.02Berkshire County | 3,511 | $143,173 |
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 Williamstown CDP) · Census block assignment files
How does Williamstown CDP compare with other places in Massachusetts?
Williamstown CDP ranks 285th of 453 places in Massachusetts with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 285th | 460 |
| Residents per square mile | 146th | 461 |
| Median household income | 285th | 453 |
| Per capita income | 329th | 460 |
| Median home value | 306th | 459 |
| Median gross rent | 247th | 410 |
| Poverty rate | 17th | 338 |
| Bachelor's degree or higher | 37th | 459 |
| Median age | 459th | 461 |
| Owner-occupied share | 393rd | 460 |
| Work from home | 137th | 429 |
| Travel time to work | 458th | 459 |
Williamstown CDP's figures with every place in Massachusetts (CSV)
Every place in Massachusetts, sortable · Compare Williamstown CDP 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 Williamstown CDP?
15 of the 57 figures for Williamstown CDP 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 Williamstown CDP 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.