Princeton

County:: Mercer County
County Seat:: No
Area (mi²):: 17.946
State:: New Jersey

Princeton is a township located in Mercer County, New Jersey. Princeton has a 2025 population of 30,075. Princeton is currently declining at a rate of -0.35% annually and its population has decreased by -1.75% since the most recent census, which recorded a population of 30,610 in 2020.

The average household income in Princeton is $278,669 with a poverty rate of 6.84%. The median age in Princeton is 27.5 years: 26.8 years for males, and 29.2 years for females.

Demographics

The racial composition of Princeton includes 62.82% White, 19.96% Asian, 6.66% Black or African American, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Asian

Two or more races

Black or African American

Other race

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	19,129	62.82%
Asian	6,077	19.96%
Two or more races	2,316	7.61%
Black or African American	2,029	6.66%
Other race	518	1.7%
Native American	370	1.22%
Native Hawaiian or Pacific Islander	12	0.04%

Princeton Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Princeton's average per capita income is $103,306. Household income levels show a median of $184,113. The poverty rate stands at 6.84%.

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
Families	$250,001	$351,804
Married Families	$250,001	-
Households	$184,113	$278,669
Non Families	$79,286	$122,671

$103,306

Average Income

$184,113

Median Household Income

6.84%

Poverty Rate