Princeton ZIP Code List — Mercer County, NJ

There are 5 unique ZIP codes in Princeton, New Jersey. Area code: 609.

ZIP codes

52.27

sq mi land

1.04

sq mi water

609

area code

Princeton, NJ ZIP code map

About Princeton, NJ

Princeton, New Jersey is a prestigious town known for its rich history and vibrant academic atmosphere. It is home to Princeton University, one of the oldest and most esteemed universities in the United States. The town combines a quaint, small-town charm with a bustling intellectual community.

Location & geography

Situated in Mercer County, Princeton lies approximately 16 miles north of Trenton, 25 miles southwest of Newark, and about 50 miles southwest of New York City. The town covers a total area of 52.27 square miles, with 1.04 square miles designated as water. Its picturesque landscape features rolling hills and numerous parks, providing residents and visitors with scenic outdoor spaces.

Community & economy

The character of Princeton reflects a blend of academic excellence and community engagement, with a diverse population that values education and the arts. Key industries in the area include education, research, and healthcare, largely driven by the presence of Princeton University and several research institutions. Daily life in Princeton is often lively, with events, farmers markets, and cultural festivals attracting both locals and tourists.

Transportation

Princeton is well-served by major highways, including U.S. Route 1, which provides easy access to nearby cities and regions. The nearest airport is Trenton-Mercer Airport, located about 12 miles away, offering regional flights. Additionally, the town has a local train station that connects residents to New York City and Philadelphia via NJ Transit.

History

Founded in 1756, Princeton has a rich historical legacy, particularly as the site of the Battle of Princeton during the American Revolutionary War. The town has been shaped significantly by its educational institutions, particularly Princeton University, which has influenced local culture and economy for centuries. Notable events include the signing of the 'Treaty of Princeton' in 1783, which was critical in the establishment of the United States.

Did you know?

An interesting fact about Princeton is that it was once the capital of the United States for a brief period in the late 1780s. Additionally, the town's rich literary heritage includes famous authors like F. Scott Fitzgerald and Toni Morrison who have ties to Princeton.

ZIP codes for Princeton, NJ (5)

ZIP code	City	County	Map
08540	Princeton	Mercer	View map
08541	Princeton	Mercer	View map
08542	Princeton	Mercer	View map
08543	Princeton	Mercer	View map
08544	Princeton	Mercer	View map

Demographics & statistics

51,108

Population

40.2

Median age

$160,831

Median household income

$83,807

Per capita income

$697,350

Median home value

$2,356

Median monthly rent

54.5%

Home ownership

7.4%

Poverty rate

3.9%

Unemployment

13,343

Housing units

79.2%

Bachelor's or higher

Age distribution

Male Female

1,227

Under 5

1,151

1,542

5–9

1,445

2,065

10–14

1,937

2,025

15–19

1,899

1,761

20–24

1,652

2,905

25–34

2,723

3,287

35–44

3,083

4,129

45–54

3,872

1,802

55–59

1,689

1,667

60–64

1,563

2,018

65–74

1,893

1,382

75–84

1,296

565

85+

530

← Male

Female →

Age summary

Group	Count	%
Under 18	11,539	17.6%
18 and over	39,569	82.4%
65 and over	7,684	13.0%
Median age	40.2 years

Race & ethnicity

White 53.3%

Asian 29.1%

Black or African American 6.3%

Two or more races 5.3%

Hispanic or Latino 4.1%

Other race 1.4%

American Indian / Alaska Native 0.5%

Group	Count	%
White	28,414	53.3%
Asian	15,493	29.1%
Black or African American	3,382	6.3%
Two or more races	2,811	5.3%
Hispanic or Latino	2,167	4.1%
Other race	731	1.4%
American Indian / Alaska Native	262	0.5%

Household income

Under $10k 1.8%

$10k–$15k 1.9%

$15k–$25k 1.5%

$25k–$35k 4.1%

$35k–$50k 4.3%

$50k–$75k 7.3%

$75k–$100k 10.0%

$100k–$150k 15.8%

$150k–$200k 16.5%

$200k+ 37.1%

Range	% of households
Under $10k	1.8%
$10k–$15k	1.9%
$15k–$25k	1.5%
$25k–$35k	4.1%
$35k–$50k	4.3%
$50k–$75k	7.3%
$75k–$100k	10.0%
$100k–$150k	15.8%
$150k–$200k	16.5%
$200k+	37.1%
Median income	$160,831

Housing

Home values

Under $50k 0.8%

$50k–$100k 0.7%

$100k–$150k 3.7%

$150k–$200k 5.4%

$200k–$300k 1.4%

$300k–$500k 16.5%

$500k–$1M 54.1%

$1M+ 17.6%

Housing overview

Metric	Value
Median home value	$697,350
Median rent / month	$2,356
Owner occupied	54.5%
Renter occupied	45.5%
Vacant	11.0%
Single-family detached	38.3%
Large apartment buildings	10.5%
Mobile homes	0.0%
Median rooms	5.4
Avg household size (owned)	2.53

Year built

Era	%
2020 or later	0.1%
2010–2019	7.9%
2000–2009	14.4%
1990–1999	9.0%
1980–1989	11.8%
1970–1979	4.3%
1960–1969	5.5%
1950–1959	7.3%
1940–1949	2.8%
1939 or earlier	37.1%

Bedrooms

Size	% of units
No bedroom (studio)	5.5%
1 bedroom	15.8%
2 bedrooms	31.4%
3 bedrooms	24.9%
4 bedrooms	16.9%
5+ bedrooms	5.6%

Vehicles per household

Vehicles	% of households
No vehicle	21.8%
1 vehicle	29.1%
2 vehicles	39.0%
3 or more	10.1%

Heating fuel

Fuel type	%
Utility gas	73.4%
Electricity	20.0%
Propane / LP gas	0.8%
Fuel oil	4.2%
No fuel used	0.8%

Households & families

Household type	Count	%
Married-couple family	11,047	50.8%
Cohabiting couple	479	4.6%
Male householder, no spouse	2,797	19.5%
Female householder, no spouse	4,394	25.2%
Households with children under 18	6,736	27.4%
Households with seniors (65+)	5,148	22.9%
Average household size	2.44

Marital status

Status	Male	Female
Never married	40.2%	33.2%
Married	51.2%	49.2%
Separated	3.5%	1.8%
Widowed	0.9%	5.6%
Divorced	4.3%	10.4%

Education

Less than 9th grade 1.3%

Some HS, no diploma 3.1%

HS graduate 6.8%

Some college, no degree 7.8%

Associate's degree 2.0%

Bachelor's degree 30.9%

Graduate / professional 48.4%

Metric	%
HS diploma or higher	95.7%
Bachelor's or higher	79.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	646	4.6%
Kindergarten	926	10.1%
Elementary school	5,587	28.8%
High school	2,995	20.7%
College / grad school	5,855	35.9%

Employment

Industry of employment

Education & healthcare 42.5%

Professional & management 20.9%

Manufacturing 7.0%

Finance & real estate 6.7%

Retail trade 5.8%

Arts, food & hospitality 4.7%

Public administration 2.7%

Construction 2.6%

Information 2.0%

Other services 2.0%

Transportation & utilities 1.5%

Wholesale trade 1.5%

Agriculture & mining 0.6%

Occupation

Category	%
Management, business & arts	78.2%
Service	7.3%
Sales & office	10.0%
Natural resources & construction	2.7%
Production & transportation	2.0%

Employment type

Type	%
Private sector	84.4%
Government	11.1%
Self-employed	4.5%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	39.2%
Carpool	4.5%
Public transit	6.0%
Walk	13.5%
Other means	11.5%
Avg commute (minutes)	27.8

Poverty

All people 7.4%

Under 18 years 4.3%

18 and over 7.7%

Married-couple families 1.8%

Female-led households 18.9%

Income support

Source	% of households
Social Security	20.3%
Retirement income	16.8%
Supplemental Security	1.8%
Cash public assistance	2.0%
Food stamps / SNAP	2.9%

Health indicators

Condition	%
High blood pressure	0.0%
High cholesterol	0.0%
Heart disease	3.4%
Stroke	1.5%
Asthma	8.4%
Arthritis	13.7%
Kidney disease	1.7%
Pulmonary disease	2.8%
Cancer	4.7%

Behavior / access	%
Binge drinking	18.0%
No physical activity	13.2%
Less than 7 hrs sleep	29.8%
Fair or poor health	6.4%
Poor mental health	12.6%
Poor physical health	5.1%
No health insurance	10.0%
Visited doctor (checkup)	72.8%
Visited dentist	74.2%
Cholesterol screening	0.0%
Teeth loss	6.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,007	1.9%

Disability	%
Any disability	7.6%
Under 18	3.5%
18–64 years	4.7%
65 and over	30.6%

Health insurance coverage

Type	%
Private insurance	88.4%
Public insurance	18.9%
Uninsured under 19	0.5%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	48,730	95.8%
Spanish	5,776	10.3%
Other Indo-European	986	3.6%
Asian & Pacific Islander	2,058	2.3%
Other languages	2,559	4.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	32,378	67.8%
Born in same state	31,514	66.3%
Born in different state	14,641	28.2%
Foreign born	864	1.5%
Naturalized citizen	18,730	32.2%
Not a US citizen	9,842	51.3%

Ancestry

Ancestry	Count	%
French	4,058	7.9%
Italian	3,726	7.3%
Arab	1,333	2.6%
Irish	545	1.1%
Polish	466	0.9%

Ancestry	Count	%
English	333	0.7%
Dutch	274	0.5%
German	169	0.3%
Norwegian	126	0.2%

Technology access

Metric	% of households
Computer access	40.1%
Internet access	98.2%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What ZIP codes does Princeton, NJ have?

Princeton, NJ has 4 ZIP codes: 08540, 08541, 08542, 08544. Each ZIP code serves a distinct delivery area within the city and surrounding region.

What is the main ZIP code for Princeton, NJ?

The primary ZIP code for Princeton, NJ is 08540. The city uses area code 609 for phone service.

What county is Princeton, NJ in?

Princeton is located in Mercer County, New Jersey.

How many ZIP codes are in Princeton, NJ?

Princeton, NJ has 4 ZIP codes.

What ZIP code is Princeton University's main campus located in?

Princeton University's main campus is primarily located in ZIP code 08540, which covers the central academic area of Princeton.

Which ZIP codes serve the downtown Princeton area along Nassau Street?

Downtown Princeton's main commercial district along Nassau Street is served by ZIP codes 08540 and 08541, with 08540 being the primary ZIP for the historic town center.