Williamstown, NJ demographics:
population, income, and more

Total population
14,705
-1.0% year-over-year change
Median household income
$89,414/yr
2.8% year-over-year change
Housing units
6,143
1.0% year-over-year change

Williamstown population

How many people live in Williamstown

Williamstown is home to 14,705 residents, according to the most recent Census data. Gender-wise, 45.3% of Williamstown locals are male, and 54.7% are female.

Total population
14,705
-1.0% year-over-year change
Gender ratio
Male
45.3%
6,657
Female
54.7%
8,048
Value Percent YoY change
Male 6,657 45.3% -2.5%
Female 8,048 54.7% 0.3%
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 43, with the population distributed as follows: about 14.4% are children under 15, then 12.8% are in the 15 to 24 age group. Adults between 25 and 44 make up 25.4% of the population, while another 30.4% fall into the 45 to 64 bracket. Finally, around 17.1% are 65 or older.

Median age
42.7
Age breakdown
Under 15
14.4%
15 to 24
12.8%
25 to 44
25.4%
45 to 64
30.4%
Over 65
17.1%
Value Percent YoY change
Under 15 2,113 14.4% -14.0%
15 to 24 1,876 12.8% 0.8%
25 to 44 3,728 25.4% -0.8%
45 to 64 4,469 30.4% 1.4%
Over 65 2,519 17.1% 6.2%
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, 95.6% of the population are US-born citizens, while 4.1% have gained naturalized citizenship. At the same time, 0.3% of residents are non-citizens. As for race, 77.4% of locals are Caucasian, 10.7% are African American and 1.2% have Asian roots. There’s also a share of 9.6% that includes residents with two or more races.

Citizenship
U.S.-born citizens
95.6%
Non-U.S.-born citizens
4.1%
Non-citizens
0.3%
Value Percent YoY change
U.S.-born citizens 14,053 95.6% -0.4%
Non-U.S.-born citizens 604 4.1% -9.8%
Non-citizens 48 0.3% -31.4%
Racial breakdown
White
77.4%
Black or African American
10.7%
American Indian and Alaska Native
0.1%
Asian
1.2%
Native Hawaiian and other Pacific Islander
0%
Two or more races
9.6%
Other
1%
Value Percent
White 11,381 77.4%
Black or African American 1,579 10.7%
American Indian and Alaska Native 14 0.1%
Asian 178 1.2%
Two or more races 1,414 9.6%
Other 139 1%

Households in Williamstown

A peek inside Williamstown households

Williamstown has 5,775 households, with an average of 3 members in each. Of these, 62.6% are families, while the remaining 37.4% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
5,775
-1.4% year-over-year change
Average people per household
3
Non-family households
2,162
Family households
3,613
Value Percent YoY change
Non-family households 2,162 37.4% -3.4%
Family households 3,613 62.6% -0.1%
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 6,143 units, with 76.4% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 5.8% and offer a more compact, shared living style.

Housing units
6,143
1.0% year-over-year change
Housing types
Value Percent
1 unit, detached 4,693 76.4%
1 unit, attached 356 5.8%
2 units 225 3.7%
3 or 4 units 278 4.5%
5 to 9 units 77 1.2%
10 to 19 units 163 2.6%
20 to 49 units 125 2%
50 or more units 226 3.7%
Homes built since 2020
18
12.5% year-over-year change

The age of buildings in Williamstown

In Williamstown, the median construction year is 1981. About 8% of homes were built before the 1940s, with another 3.7% going up by 1949. Most development happened in the second half of the 20th century. Then, 16.1% of homes were added from 2000 to 2009, 2% between 2010 and 2019, and 0.3% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 493 8% -11.0%
Built between 1940 and 1949 229 3.7% 38.8%
Built between 1950 and 1959 395 6.4% -12.2%
Built between 1960 and 1969 554 9% -14.0%
Built between 1970 and 1979 1,280 20.8% 12.2%
Built between 1980 and 1989 825 13.4% 19.2%
Built between 1990 and 1999 1,241 20.2% -6.6%
Built between 2000 and 2009 987 16.1% -0.6%
Built between 2010 and 2019 121 2% 23.5%
Built in 2020 or later 18 0.3% 12.5%
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 5,775 occupied housing units in Williamstown, 81.7% are owner-occupied, while 18.3% are lived in by tenants. Meanwhile, 6% of all homes on the local market sit vacant.

Occupied housing units
5,775
-1.4% year-over-year change
Occupancy breakdown
Renter occupied
1,058
Owner occupied
4,717
Value Percent YoY
change
Renter occupied 1,058 18.3% -11.5%
Owner occupied 4,717 81.7% 1.2%
Unoccupied housing units
6.0%
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 $1,846 per month, while tenants specifically pay a median gross rent of $1,266.

Median housing costs per month
$1,846/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
$1,266/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 36.6% of the population in Williamstown went to high school, while 22.6% pursued college studies. Another 10.2% earned an associate degree and 21.9% hold a bachelor’s. Meanwhile, 7.5% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 148 1.2% 15.6%
High school diploma 4,409 36.6% 0.4%
College diploma 2,717 22.6% -2.6%
Associate degree 1,228 10.2% -3.1%
Bachelor's degree 2,634 21.9% 4.7%
Graduate degree 900 7.5% 17.8%
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 $108,849 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +4.7% change from the previous year. At the same time, the median income stood at $89,414, reflecting a +2.8% shift over the same period.

Average household income in Williamstown
$108,849/year
4.7% year-over-year change
Median household income in Williamstown
$89,414/year
2.8% 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 $94,063. Those with someone between 45 and 64 in charge, often well established professionally, earn $119,849 overall. Overall, 91.7% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $94,063 4.7%
45 - 64 $119,849 5.0%
Over 65 $56,455 -7.6%
Above poverty level
13,224
Below poverty level
1,200
Value Percent YoY
change
Above poverty level 13,224 91.7% -2.6%
Below poverty level 1,200 8.3% 12.4%

Average renter income in Williamstown

To get a better sense of what renters earn on average in Williamstown, their median household income was $43,750 according to 2022 Census data. In addition, the rent-to-income ratio in the area, at 34.7%, shows what portion of their earnings goes toward housing expenses.

Renter median household income
$43,750
Rent-to-income ratio
34.7%
Understanding the rent-to-income ratio can help renters gauge if local housing costs align with their earnings. A ratio under 30% usually signals affordability, while exceeding this mark means rent is taking a larger-than-recommended bite out of income. That could make it harder for you to cover other costs like transportation, healthcare, or child care.

Employment in Williamstown

Workforce and job types in Williamstown

The job market in Williamstown is powered by 7,791 working residents, spread across a range of industries and roles. 81.8% of the working population are employed in professional or administrative positions, while 18.2% are in hands-on or service-based jobs. Also, 5.4% run their own businesses, 71.6% are employed by private companies, and 17.3% work in the public sector.

Workforce demographics

Working population
7,791
1.6% year-over-year change
White collar
6,374
Blue collar
1,417
Value Percent YoY change
White collar 6,374 81.8% 4.9%
Blue collar 1,417 18.2% -11.0%
Employer type
Self employees
5.4%
Private companies
71.6%
Governmental workers
17.3%
Not for profit companies
5.6%
Value Percent YoY change
Self employees 424 5.4% 9.3%
Private companies 5,582 71.6% 2.4%
Governmental workers 1,349 17.3% -11.2%
Not for profit companies 436 5.6% 41.1%
Unemployment rate
5.6%
0.0% year-over-year change

Available workforce

The unemployment rate in Williamstown stands at 5.6%, 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: 83.2% of residents travel by personal vehicle and 1.3% 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 6,407 83.2% -4.6%
Bus or trolleybus 24 0.3% -59.3%
Subway or elevated 45 0.6% N/A
Railroad 47 0.6% 34.3%
Walk 100 1.3% 9,900.0%
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.

What is the median and average household income in Williamstown by zipcode?

Zipcode Population Number of households Median income Average income
08094 41,595 15,574 $96,699 $121,090

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FAQs about Williamstown demographics 

What is the total population of Williamstown?

Williamstown has a total population of 14,705 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 -1.0% compared to a year ago.

What is the gender ratio in Williamstown?

The gender ratio in Williamstown is as follows:
  • 45.3% males (6,657 residents)
  • 54.7% females (8,048 residents)

What is the median age in Williamstown?

The median age in Williamstown is 42.7.

What is the age distribution of the population in Williamstown?

The age distribution in Williamstown is as follows:
  • Under 15: 14.4% (2,113 residents)
  • Ages 15-24: 12.8% (1,876 residents)
  • Ages 25-44: 25.4% (3,728 residents)
  • Ages 45-64: 30.4% (4,469 residents)
  • Over 65: 17.1% (2,519 residents)

What is the racial and ethnic makeup of Williamstown?

The racial and ethnic makeup of Williamstown is as follows:
  • White: 77.4% (11,381 residents)
  • Black or African American: 10.7% (1,579 residents)
  • American Indian and Alaska Native: 0.1% (14 residents)
  • Asian: 1.2% (178 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 9.6% (1,414 residents)
  • Other: 1% (139 residents)

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

U.S.-born citizens represent 95.6% of the population in Williamstown.

How many housing units are there in Williamstown?

There are 6,143 housing units in Williamstown, reflecting a +1.0% 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 5,775 households, with an average of 3 people in each.

What is the median household income in Williamstown?

Williamstown has a median household income of $89,414, representing a +2.8% 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 94.4% in Williamstown, with a workforce of 7,791 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 81.8% (6,374 residents)
  • Blue-collar workers: 18.2% (1,417 residents)

Places of employment:
  • Self-employed: 5.4% (424 residents)
  • Private companies: 71.6% (5,582 residents)
  • Governmental workers: 17.3% (1,349 residents)
  • Not-for-profit companies: 5.6% (436 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