Williamstown, Massachusetts Demographics & Population 2026
During the 2020–2024 ACS period, Williamstown, Massachusetts had a total population of 5,070, the 123rd largest community in Massachusetts, with a median household income of $97,917, which is 6% lower than the state average. The poverty rate is 18.0%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- 75.4% of adults hold a bachelor's degree or higher — top 10% in Massachusetts.
- Near full employment with an unemployment rate of just 1.7%.
Williamstown Quick Facts
How Williamstown Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 4,352 | 5,070 | +16.5% |
| Median household income | $82,917 | $97,917 | +18.1% |
| Median home value | $436,900 | $439,300 | +0.5% |
How Williamstown Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 53 | National average: 61
Education
Educational Attainment (Adults 25+)
Williamstown Rankings in Massachusetts
Explore Massachusetts Rankings
Other Cities in Berkshire County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Pittsfield | 43,457 | $70,582 | 14.9% | $256,900 |
| North Adams | 12,606 | $47,500 | 18.6% | $195,900 |
| Adams | 5,427 | $48,775 | 15.1% | $197,400 |
| Great Barrington | 2,331 | $64,506 | 12.9% | $524,700 |
| Lenox | 1,866 | $61,335 | 11.3% | $410,700 |
| Lee | 1,511 | $70,724 | 11.3% | $300,500 |
| Housatonic | 1,113 | N/A | 16.8% | $437,000 |
| Cheshire | 674 | N/A | 17.8% | N/A |
| Lenox Dale | 29 | N/A | 100.0% | N/A |
Cities Similar to Williamstown
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Marshfield | 5,161 | $97,105 | $675,300 | 49.9% | 17.4% |
| Bellingham | 5,325 | $96,763 | $431,200 | 35.3% | 1.8% |
| Ipswich | 4,924 | $104,102 | $598,400 | 55.2% | 5.6% |
| North Westport | 5,289 | $87,582 | $411,300 | 17.0% | 4.3% |
| Westborough | 4,699 | $106,200 | $584,900 | 54.9% | 9.7% |
Population Overview
Williamstown is a small city located in Massachusetts, within Berkshire County. The total population is 5,070. It ranks as the 123rd most populous out of 248 Census-designated places in Massachusetts.
Age Demographics
The median age in Williamstown is 21.9 years. This is 45% lower than the state median of 40.0 years. Only 12.9% of residents are under 18, indicating fewer families with children.
Economy, Income & Housing
The median household income in Williamstown is $97,917. This is 6% lower than the state median of $103,960. It is also 21% higher than the national median of $80,734. The poverty rate stands at 18.0%. This is 79% higher than the state poverty rate of 10.0%. The unemployment rate is 1.7%. This is 68% lower than the state rate of 5.1%. The median home value is $439,300. Housing costs are 22% lower than the state median of $562,100. The home-value-to-income ratio is 4.5x. 61.5% of occupied housing units are owner-occupied. This homeownership rate is 2% lower than the state average of 62.5%.
Race & Ethnicity
The largest racial or ethnic group in Williamstown is White (non-Hispanic), making up 71.6% of the population. Asian residents account for 7.6%. The Hispanic or Latino population (6.3%) is well below the state average of 13.3%.
Education
75.4% of residents aged 25 and older hold a bachelor's degree or higher. This places Williamstown in the top 10% of all cities in the state for educational attainment. This is 59% higher than the state rate of 47.3%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 98.6%. Notably, 54.3% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Williamstown, Massachusetts is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Massachusetts state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 248 Census-designated places in Massachusetts. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Williamstown, Massachusetts?
Williamstown, Massachusetts has a population of 5,070 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Williamstown, MA?
The median household income in Williamstown is $97,917, which is 21% higher than the national median of $80,734.
What is the poverty rate in Williamstown, MA?
The poverty rate in Williamstown is 18.0%. This means approximately 546 residents live below the federal poverty line.
What is the racial makeup of Williamstown, Massachusetts?
Williamstown's population is 71.6% White, 5.5% Black, 6.3% Hispanic/Latino, and 7.6% Asian.
What is the median home value in Williamstown, MA?
The median home value in Williamstown is $439,300. The home-value-to-income ratio is 4.5x.
How educated is Williamstown, Massachusetts?
75.4% of adults (25+) in Williamstown hold a bachelor's degree or higher, and 54.3% hold a graduate or professional degree.