Williamstown

County:: Gloucester County
County Seat:: No
Area (mi²):: 7.421
State:: New Jersey

Williamstown is a CDP located in Gloucester County, New Jersey. Williamstown has a 2025 population of 14,571. Williamstown is currently declining at a rate of -0.45% annually but its population has increased by 2.9% since the most recent census, which recorded a population of 14,161 in 2020.

The average household income in Williamstown is $103,979 with a poverty rate of 7.27%. The median age in Williamstown is 40.6 years: 39.7 years for males, and 41.5 years for females.

Demographics

The racial composition of Williamstown includes 77.79% White, 9.58% Black or African American, and smaller percentages for Asian, Native American, other race, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Asian

Native American

Other race

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	11,555	77.79%
Two or more races	1,689	11.37%
Black or African American	1,423	9.58%
Asian	130	0.88%
Native American	30	0.2%
Other race	28	0.19%
Native Hawaiian or Pacific Islander	0	0%

Williamstown Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Williamstown's average per capita income is $58,112. Household income levels show a median of $87,021. The poverty rate stands at 7.27%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$126,103	-
Families	$116,772	$135,936
Households	$87,021	$103,979
Non Families	$46,077	$49,953

$58,112

Average Income

$87,021

Median Household Income

7.27%

Poverty Rate