Williamstown CDP, Massachusetts Demographics & Population 2026
As of 2026, Williamstown CDP, Massachusetts has a total population of 4,352, the 131st largest city in Massachusetts, with a median household income of $82,917, which is 18% lower than the state average. The poverty rate is 15.9%.
Key Takeaways
- 74.4% of adults hold a bachelor's degree or higher — top 10% in Massachusetts.
- Near full employment with an unemployment rate of just 1.9%.
Williamstown CDP Quick Facts
How Williamstown CDP Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 51 | National average: 60
Education
Educational Attainment (Adults 25+)
Williamstown CDP Rankings in Massachusetts
Explore Massachusetts Rankings
Cities Similar to Williamstown CDP
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Wilbraham CDP | 4,247 | $88,409 | $361,600 | 45.7% | 8.5% |
| Northwest Harwich CDP | 4,205 | $89,063 | $596,800 | 45.3% | 7.9% |
| North Plymouth CDP | 4,458 | $71,205 | $456,600 | 33.4% | 18.3% |
| Rockport CDP | 4,795 | $86,250 | $694,300 | 59.1% | 3.1% |
| Winchendon CDP | 4,407 | $67,188 | $258,300 | 25.2% | 14.3% |
Population Overview
Williamstown CDP is a small community located in Massachusetts. The total population is 4,352. It ranks as the 131st most populous out of 248 cities and towns in Massachusetts.
Age Demographics
The median age in Williamstown CDP is 21.9 years. This is 45% lower than the state median of 40.0 years. Only 13.4% of residents are under 18, indicating fewer families with children.
Economy, Income & Housing
The median household income in Williamstown CDP is $82,917. This is 18% lower than the state median of $101,341. Compared to the national median of $78,538, household income here is 6% higher. The poverty rate stands at 15.9%. This is 59% higher than the state poverty rate of 10.0%. The unemployment rate is 1.9%. This is 63% lower than the state rate of 5.1%. The median home value is $436,900. Housing costs are 17% lower than the state median of $525,800. The home-value-to-income ratio is 5.3x. 57.8% of occupied housing units are owner-occupied. This homeownership rate is 8% lower than the state average of 62.6%.
Race & Ethnicity
The largest racial or ethnic group in Williamstown CDP is White (non-Hispanic), making up 75.4% of the population. Asian residents account for 7.2%. The Hispanic or Latino population (4.6%) is well below the state average of 12.9%.
Education
74.4% of residents aged 25 and older hold a bachelor's degree or higher. This places Williamstown CDP in the top 10% of all cities in the state for educational attainment. This is 60% higher than the state rate of 46.6%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 99.0%. Notably, 49.9% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Williamstown CDP, Massachusetts is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. 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. For official data, visit data.census.gov.
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Frequently Asked Questions
What is the population of Williamstown CDP, Massachusetts?
Williamstown CDP, Massachusetts has a population of 4,352 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Williamstown CDP, MA?
The median household income in Williamstown CDP is $82,917, which is 6% higher the national median of $78,538.
What is the poverty rate in Williamstown CDP, MA?
The poverty rate in Williamstown CDP is 15.9%. This means approximately 378 residents live below the federal poverty line.
What is the racial makeup of Williamstown CDP, Massachusetts?
Williamstown CDP's population is 75.4% White, 4.1% Black, 4.6% Hispanic/Latino, and 7.2% Asian.
What is the median home value in Williamstown CDP, MA?
The median home value in Williamstown CDP is $436,900. The home-value-to-income ratio is 5.3x.
How educated is Williamstown CDP, Massachusetts?
74.4% of adults (25+) in Williamstown CDP hold a bachelor's degree or higher, and 49.9% hold a graduate or professional degree.