Williamstown, MA demographics:
population, income, and more

Total population
5,070
16.5% year-over-year change
Median household income
$97,917/yr
18.1% year-over-year change
Housing units
1,754
17.0% year-over-year change

Williamstown population

How many people live in Williamstown

Williamstown is home to 5,070 residents, according to the most recent Census data. Gender-wise, 44.6% of Williamstown locals are male, and 55.4% are female.

Total population
5,070
16.5% year-over-year change
Gender ratio
Male
44.6%
2,261
Female
55.4%
2,809
Value Percent YoY change
Male 2,261 44.6% 20.8%
Female 2,809 55.4% 13.2%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Williamstown is 22, with the population distributed as follows: about 11.1% are children under 15, then 46.6% are in the 15 to 24 age group. Adults between 25 and 44 make up 11.5% of the population, while another 15.7% fall into the 45 to 64 bracket. Finally, around 15.1% are 65 or older.

Median age
21.9
Age breakdown
Under 15
11.1%
15 to 24
46.6%
25 to 44
11.5%
45 to 64
15.7%
Over 65
15.1%
Value Percent YoY change
Under 15 563 11.1% 30.6%
15 to 24 2,362 46.6% 5.3%
25 to 44 583 11.5% 31.9%
45 to 64 798 15.7% 37.1%
Over 65 764 15.1% 17.0%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Williamstown, 86.1% of the population are US-born citizens, while 7.4% have gained naturalized citizenship. At the same time, 6.5% of residents are non-citizens. As for race, 72.2% of locals are Caucasian, 5.9% are African American and 7.6% have Asian roots. There’s also a share of 11.3% that includes residents with two or more races.

Citizenship
U.S.-born citizens
86.1%
Non-U.S.-born citizens
7.4%
Non-citizens
6.5%
Value Percent YoY change
U.S.-born citizens 4,367 86.1% 14.4%
Non-U.S.-born citizens 375 7.4% 47.6%
Non-citizens 328 6.5% 16.3%
Racial breakdown
White
72.2%
Black or African American
5.9%
American Indian and Alaska Native
0%
Asian
7.6%
Native Hawaiian and other Pacific Islander
0%
Two or more races
11.3%
Other
2.9%
Value Percent
White 3,663 72.2%
Black or African American 300 5.9%
Asian 388 7.6%
Two or more races 571 11.3%
Other 148 2.9%

Households in Williamstown

A peek inside Williamstown households

Williamstown has 1,534 households, with an average of 2 members in each. Of these, 44.2% are families, while the remaining 55.8% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
1,534
26.7% year-over-year change
Average people per household
2
Non-family households
856
Family households
678
Value Percent YoY change
Non-family households 856 55.8% 31.9%
Family households 678 44.2% 20.6%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Williamstown

The housing landscape of Williamstown

Williamstown's housing consists of 1,754 units, with 49.4% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 10.8% and offer a more compact, shared living style.

Housing units
1,754
17.0% year-over-year change
Housing types
Value Percent
1 unit, detached 867 49.4%
1 unit, attached 189 10.8%
2 units 149 8.5%
3 or 4 units 196 11.2%
5 to 9 units 126 7.2%
10 to 19 units 171 9.8%
20 to 49 units 42 2.4%
50 or more units 14 0.8%
Homes built since 2020
46
228.6% year-over-year change

The age of buildings in Williamstown

In Williamstown, the median construction year is 1955. About 40.4% of homes were built before the 1940s, with another 5.6% going up by 1949. Most development happened in the second half of the 20th century. Then, 1.2% of homes were added from 2000 to 2009, 5.5% between 2010 and 2019, and 2.6% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 709 40.4% 1.0%
Built between 1940 and 1949 99 5.6% 12.5%
Built between 1950 and 1959 137 7.8% 28.0%
Built between 1960 and 1969 195 11.1% 32.6%
Built between 1970 and 1979 231 13.2% 102.6%
Built between 1980 and 1989 54 3.1% -40.0%
Built between 1990 and 1999 164 9.4% 18.0%
Built between 2000 and 2009 22 1.2% 29.4%
Built between 2010 and 2019 97 5.5% 19.8%
Built in 2020 or later 46 2.6% 228.6%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Williamstown occupancy rates

Out of the 1,534 occupied housing units in Williamstown, 61.5% are owner-occupied, while 38.5% are lived in by tenants. Meanwhile, 12.5% of all homes on the local market sit vacant.

Occupied housing units
1,534
26.7% year-over-year change
Occupancy breakdown
Renter occupied
590
Owner occupied
944
Value Percent YoY
change
Renter occupied 590 38.5% 15.5%
Owner occupied 944 61.5% 34.9%
Unoccupied housing units
12.5%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Williamstown housing costs

Housing costs in Williamstown come to a median of $1,618 per month, while tenants specifically pay a median gross rent of $1,424.

Median housing costs per month
$1,618/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Williamstown
$1,424/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Williamstown

Williamstown education at a glance

About 9.4% of the population in Williamstown went to high school, while 52% pursued college studies. Another 2% earned an associate degree and 10.3% hold a bachelor’s. Meanwhile, 26.4% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
High school diploma 413 9.4% 51.8%
College diploma 2,298 52% 6.1%
Associate degree 87 2% 97.7%
Bachelor's degree 453 10.3% 0.4%
Graduate degree 1,164 26.4% 39.1%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Williamstown

How much people earn in Williamstown

The average annual household income in Williamstown was $160,463 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +4.9% change from the previous year. At the same time, the median income stood at $97,917, reflecting a +18.1% shift over the same period.

Average household income in Williamstown
$160,463/year
4.9% year-over-year change
Median household income in Williamstown
$97,917/year
18.1% year-over-year change

Williamstown income by age

In Williamstown, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $137,321. Those with someone between 45 and 64 in charge, often well established professionally, earn $119,671 overall. Overall, 82% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $26,280 0.1%
25 - 44 $137,321 -1.7%
45 - 64 $119,671 1.1%
Above poverty level
2,490
Below poverty level
546
Value Percent YoY
change
Above poverty level 2,490 82% 24.8%
Below poverty level 546 18% 44.4%

Employment in Williamstown

Workforce and job types in Williamstown

The job market in Williamstown is powered by 2,466 working residents, spread across a range of industries and roles. 95.5% of the working population are employed in professional or administrative positions, while 4.5% are in hands-on or service-based jobs. Also, 12.1% run their own businesses, 26.9% are employed by private companies, and 11.7% work in the public sector.

Workforce demographics

Working population
2,466
9.8% year-over-year change
White collar
2,355
Blue collar
111
Value Percent YoY change
White collar 2,355 95.5% 8.9%
Blue collar 111 4.5% 30.6%
Employer type
Self employees
12.1%
Private companies
26.9%
Governmental workers
11.7%
Not for profit companies
49.2%
Value Percent YoY change
Self employees 299 12.1% 52.5%
Private companies 664 26.9% 10.7%
Governmental workers 289 11.7% 65.1%
Not for profit companies 1,214 49.2% -4.9%
Unemployment rate
1.7%
-4.5% year-over-year change

Available workforce

The unemployment rate in Williamstown stands at 1.7%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Williamstown

How people get around in Williamstown

Commuting methods vary: 34.2% of residents travel by personal vehicle and 39% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 782 34.2% 24.1%
Subway or elevated 26 1.1% N/A
Bicycle 48 2.1% 128.6%
Walk 894 39% -12.0%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

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FAQs about Williamstown demographics 

What is the total population of Williamstown?

Williamstown has a total population of 5,070 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +16.5% compared to a year ago.

What is the gender ratio in Williamstown?

The gender ratio in Williamstown is as follows:
  • 44.6% males (2,261 residents)
  • 55.4% females (2,809 residents)

What is the median age in Williamstown?

The median age in Williamstown is 21.9.

What is the age distribution of the population in Williamstown?

The age distribution in Williamstown is as follows:
  • Under 15: 11.1% (563 residents)
  • Ages 15-24: 46.6% (2,362 residents)
  • Ages 25-44: 11.5% (583 residents)
  • Ages 45-64: 15.7% (798 residents)
  • Over 65: 15.1% (764 residents)

What is the racial and ethnic makeup of Williamstown?

The racial and ethnic makeup of Williamstown is as follows:
  • White: 72.2% (3,663 residents)
  • Black or African American: 5.9% (300 residents)
  • American Indian and Alaska Native: 0% (0 residents)
  • Asian: 7.6% (388 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 11.3% (571 residents)
  • Other: 2.9% (148 residents)

What percentage of the population in Williamstown are U.S.-born citizens?

U.S.-born citizens represent 86.1% of the population in Williamstown.

How many housing units are there in Williamstown?

There are 1,754 housing units in Williamstown, reflecting a +17.0% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Williamstown and what is the average household size?

Williamstown has a total of 1,534 households, with an average of 2 people in each.

What is the median household income in Williamstown?

Williamstown has a median household income of $97,917, representing a +18.1% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Williamstown?

The employment rate is 98.3% in Williamstown, with a workforce of 2,466 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 95.5% (2,355 residents)
  • Blue-collar workers: 4.5% (111 residents)

Places of employment:
  • Self-employed: 12.1% (299 residents)
  • Private companies: 26.9% (664 residents)
  • Governmental workers: 11.7% (289 residents)
  • Not-for-profit companies: 49.2% (1,214 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025