08550 ZIP Code — Princeton Junction, NJ

Mercer County, New Jersey

ZIP code 08550 is located in Princeton Junction, New Jersey, within Mercer County. It covers approximately 19.13 square miles and serves a population of 20,954 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 609.

About ZIP code 08550

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1980s, giving the area an established character. Median home value is $714,400. Owner-occupancy is high at 77%, well above the national average.

The gap between median ($196,053) and mean household income suggests income inequality — a small number of higher earners pull the average up.

The dominant occupation class is management, business, and professional, with professional and management as the leading industry. An above-average commute of 46 minutes suggests many residents work outside the immediate area. Remote work is prevalent — 37% of workers work from home.

Educational attainment is high — 82% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 08550 reflects a community defined by a highly educated population, high homeownership, and a high rate of remote workers.

20,954

population

19.13

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

08550 ZIP code map

Cities in ZIP code 08550

Below are the cities the US Postal Service accepts for ZIP code 08550. Using any city not on this list may result in mail delivery delays.

City	Status
Princeton Junction	Acceptable
Princeton Junction	Preferred

Nearby ZIP codes

08690 Trenton (3.8 mi) 08536 Plainsboro (4.2 mi) 08544 Princeton (4.6 mi) 08648 Lawrence Township (4.9 mi) 08541 Princeton (5 mi) 08619 Trenton (5.1 mi) 08691 Robbinsville (5.3 mi) 08542 Princeton (5.4 mi) 08512 Cranbury (5.4 mi) 08520 Hightstown (6 mi) 08540 Princeton (7 mi) 08528 Kingston (7.2 mi)

Demographics updated 05/2026

Population
Total population	20,954
Population density	1,095 / sq mi
State FIPS	34
County FIPS	021

Geography
Land area	19.13 sq mi
Water area	0.59 sq mi
Latitude	40.2826
Longitude	-74.6205
Timezone	Eastern (ET)
Area code	609

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	6.5%	30.6%	30.2%
$50k – $100k	14.2%	25.8%	26.7%
$100k – $200k	33.4%	28.0%	28.3%
Over $200k	45.9%	15.6%	14.8%

Demographics & statistics

20,954

Population

1,095

People per sq mi

45.3

Median age

$196,053

Median household income

$92,716

Per capita income

$714,400

Median home value

$2,688

Median monthly rent

76.9%

Home ownership

2.0%

Poverty rate

4.7%

Unemployment

6,111

Housing units

82.4%

Bachelor's or higher

Age distribution

Male Female

444

Under 5

426

612

5–9

587

1,006

10–14

964

650

15–19

623

366

20–24

350

650

25–34

622

1,510

35–44

1,447

2,006

45–54

1,922

940

55–59

900

833

60–64

798

1,025

65–74

982

470

75–84

450

189

85+

182

← Male

Female →

Age summary

Group	Count	%
Under 18	4,904	23.4%
18 and over	16,050	76.6%
65 and over	3,298	15.7%
Median age	45.3 years

Race & ethnicity

Asian 49.5%

White 37.5%

Two or more races 5%

Hispanic or Latino 3.5%

Black or African American 3%

American Indian / Alaska Native 0.8%

Other race 0.7%

Group	Count	%
Asian	10,749	49.5%
White	8,145	37.5%
Two or more races	1,086	5%
Hispanic or Latino	761	3.5%
Black or African American	643	3%
American Indian / Alaska Native	183	0.8%
Other race	148	0.7%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	6.5%	30.6%	30.2%
$50k – $100k	14.2%	25.8%	26.7%
$100k – $200k	33.4%	28.0%	28.3%
Over $200k	45.9%	15.6%	14.8%

Under $10k 1.9%

$10k–$15k 1.8%

$15k–$25k 0.7%

$25k–$35k 1.4%

$35k–$50k 4.3%

$50k–$75k 6.5%

$75k–$100k 4.6%

$100k–$150k 11.0%

$150k–$200k 18.1%

$200k+ 49.6%

Range	% of households
Under $10k	1.9%
$10k–$15k	1.8%
$15k–$25k	0.7%
$25k–$35k	1.4%
$35k–$50k	4.3%
$50k–$75k	6.5%
$75k–$100k	4.6%
$100k–$150k	11.0%
$150k–$200k	18.1%
$200k+	49.6%
Median income	$196,053

Housing

Home values

Under $50k 0.2%

$50k–$100k 0.3%

$100k–$150k 0.4%

$150k–$200k 0.7%

$200k–$300k 1.4%

$300k–$500k 14.2%

$500k–$1M 72.6%

$1M+ 10.1%

Housing overview

Metric	Value
Median home value	$714,400
Median rent / month	$2,688
Owner occupied	76.9%
Renter occupied	23.1%
Vacant	2.8%
Single-family detached	71.9%
Large apartment buildings	4.8%
Mobile homes	0.0%
Median rooms	7.6
Avg household size (owned)	2.81

Year built

Era	%
2020 or later	0.0%
2010–2019	6.7%
2000–2009	16.2%
1990–1999	19.3%
1980–1989	28.4%
1970–1979	12.0%
1960–1969	5.9%
1950–1959	6.0%
1940–1949	1.3%
1939 or earlier	4.3%

Bedrooms

Size	% of units
No bedroom (studio)	0.2%
1 bedroom	7.2%
2 bedrooms	22.3%
3 bedrooms	18.2%
4 bedrooms	36.9%
5+ bedrooms	15.1%

Vehicles per household

Vehicles	% of households
No vehicle	5.1%
1 vehicle	26.9%
2 vehicles	49.3%
3 or more	18.7%

Heating fuel

Fuel type	%
Utility gas	77.6%
Electricity	17.8%
Propane / LP gas	0.3%
Fuel oil	4.2%

Households & families

Household type	Count	%
Married-couple family	5,510	72.0%
Cohabiting couple	66	0.9%
Male householder, no spouse	548	7.2%
Female householder, no spouse	1,534	20.0%
Households with children under 18	2,961	38.7%
Households with seniors (65+)	2,305	30.1%
Average household size	2.74

Marital status

Status	Male	Female
Never married	24.1%	20.9%
Married	68.3%	66.5%
Separated	0.5%	0.0%
Widowed	1.6%	6.9%
Divorced	5.4%	5.7%

Education

Less than 9th grade 0.6%

Some HS, no diploma 0.7%

HS graduate 6.7%

Some college, no degree 6.7%

Associate's degree 2.9%

Bachelor's degree 31.7%

Graduate / professional 50.7%

Metric	%
HS diploma or higher	98.7%
Bachelor's or higher	82.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	355	6.3%
Kindergarten	382	6.8%
Elementary school	2,499	44.2%
High school	1,203	21.3%
College / grad school	1,210	21.4%

Employment

Industry of employment

Professional & management 26.9%

Finance & real estate 21.1%

Education & healthcare 21.1%

Manufacturing 7.0%

Retail trade 6.0%

Information 4.8%

Arts, food & hospitality 4.2%

Wholesale trade 2.9%

Public administration 2.8%

Transportation & utilities 1.5%

Other services 1.1%

Construction 0.6%

Occupation

Category	%
Management, business & arts	79.2%
Service	4.0%
Sales & office	13.6%
Natural resources & construction	0.2%
Production & transportation	2.9%

Employment type

Type	%
Private sector	86.4%
Government	8.7%
Self-employed	4.8%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	42.3%
Carpool	3.6%
Public transit	14.2%
Walk	1.3%
Work from home	37.1%
Other means	1.5%
Avg commute (minutes)	45.6

Poverty

All people 2.0%

Under 18 years 0.0%

18 and over 2.6%

Married-couple families 1.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	24.8%
Retirement income	20.4%
Supplemental Security	1.6%
Cash public assistance	1.5%
Food stamps / SNAP	2.4%

Health indicators

Condition	%
Obesity	19.9%
High blood pressure	0.0%
High cholesterol	0.0%
Diabetes	7.3%
Heart disease	4.2%
Stroke	1.8%
Asthma	7.3%
Arthritis	17.7%
Kidney disease	2.0%
Pulmonary disease	2.9%
Cancer	6.3%

Behavior / access	%
Smoking	6.6%
Binge drinking	13.5%
No physical activity	13.2%
Less than 7 hrs sleep	29.0%
Depression	13.2%
Fair or poor health	6.0%
Poor mental health	9.3%
Poor physical health	5.1%
No health insurance	6.7%
Visited doctor (checkup)	76.6%
Visited dentist	78.1%
Cholesterol screening	0.0%
Teeth loss	4.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	282	1.8%

Disability	%
Any disability	4.9%
Under 18	0.3%
18–64 years	2.8%
65 and over	19.5%

Health insurance coverage

Type	%
Private insurance	89.6%
Public insurance	17.3%
No insurance	4.1%
Uninsured under 19	2.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	20,084	95.8%
Spanish	2,217	11.0%
Other Indo-European	290	1.4%
Asian & Pacific Islander	635	3.2%
Other languages	1,222	6.1%

Place of birth & citizenship

Origin	Count	%
Native born (US)	12,045	57.5%
Born in same state	11,674	55.7%
Born in different state	5,954	28.4%
Foreign born	371	1.8%
Naturalized citizen	8,909	42.5%
Not a US citizen	6,047	67.9%

Ancestry

Ancestry	Count	%
Italian	1,741	8.3%
French	917	4.4%
Arab	541	2.6%
Irish	184	0.9%
Polish	70	0.3%

Ancestry	Count	%
English	69	0.3%
Norwegian	63	0.3%
German	35	0.2%
Dutch	16	0.1%

Technology access

Metric	% of households
Computer access	36.5%
Internet access	99.6%

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

Frequently asked questions about ZIP code 08550

What city is ZIP code 08550 in?

ZIP code 08550 is primarily assigned to Princeton Junction, New Jersey.

What county is ZIP code 08550 in?

ZIP code 08550 falls within Mercer County, New Jersey.

How educated is the population of ZIP code 08550?

82% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the median household income in ZIP code 08550?

The median household income in ZIP code 08550 is $196,053, above the national median of ~$75,000.

What is the typical home value in ZIP code 08550?

The median home value in ZIP code 08550 is $714,400.

What is the population of ZIP code 08550?

ZIP code 08550 has an estimated population of 20,954 residents, with a density of 1,095 people per square mile.

What timezone is ZIP code 08550 in?

ZIP code 08550 observes the EST timezone.