PlainZIP

Princeton Junction, NJ · standard

ZIP Code 08550

Mercer County, New Jersey - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

19,445
404/sq mi
$224,213
Median income
$807,200
Median home value
85.5%
Bachelor's or higher

The verdict

Princeton Junction pairs a top-decile household income with top-decile home values, in a low-density, homeowner-dominated area.

Top 1%
household income, US ZIPs
Top 4%
home value, US ZIPs
404
people per sq mi
76%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 08550 against every reporting US ZIP.

ZIP code 08550 is a mid-sized community (a standard USPS delivery area) in Princeton Junction, Mercer County, New Jersey, home to 19,445 residents across 48.1 square miles, a density of 404 people per square mile, in the New York time zone.

ZIP 08550 skews affluent, with a median household income of $224,213 (84% above the New Jersey average), while per-capita income is $100,495. The poverty rate stands at 2.5% and the unemployment rate at 2.7%. Housing costs here run $807,200 for a typical home value (56% above the state average), with rent averaging $2,584 a month; 76.1% of homes are owner-occupied.

This is a highly-educated ZIP: 85.5% of adults hold a bachelor's degree or higher, the median age is 45.4, and the average commute is 43 minutes. To put 08550 in local context, 10 ZIP codes within roughly 10 miles appear further down this page alongside 6 additional ZIPs in Mercer County, for a geography-aware comparison.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 08550

Top 5 sectors by establishment count in Princeton Junction, NJ

Which industries have the most business establishments in ZIP 08550.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 08550, Princeton Junction, NJ · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

19,445

Population

48.1

Area (sq mi)

404

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 08550?

45.4

Median Age

50.7%

Male

49.3%

Female

47.7%

Foreign-Born

White 34.2%
African American 1.6%
Asian 55.0%
American Indian or Alaska Native 0.2%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 8.1%
Hispanic or Latino 4.8%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$224,213

Median Household Income

+84% vs state

$100,495

Per Capita Income

2.5%

Poverty Rate

2.7%

Unemployment Rate

43.1 min

Mean Commute Time

How ZIP 08550 ranks nationally

Princeton Junction, NJ household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$224,213 Top 1% higher than 99% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Below this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Below this entry. $140,000–$160,000: 686 US ZIPs (2%). Below this entry. $160,000–$180,000: 364 US ZIPs (1%). Below this entry. $180,000–$200,000: 186 US ZIPs (1%). Below this entry. $200,000–$220,000: 324 US ZIPs (1%). This entry sits in this band. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 90.9%
Bachelor's Degree or Higher 85.5%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

7,941

Total Housing Units

7,817

Occupied Units

124

Vacant Units

2.69

Avg Household Size

Occupancy Type

Owner 76.1%
Renter 23.9%

$807,200

Median Home Value

+56% vs state

$2,584

Median Rent

1987

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+6.2%

YoY Change (2024)

259

HPI Index (2000 = 100)

+159%

Total Change Since 2000

Home values in ZIP 08550 have increased 6.2% over the past year (2024). Since 2000, this ZIP has seen +159% cumulative appreciation.

Year Annual Change HPI Index
2020 +2.0% 171
2021 +6.0% 181
2022 +15.3% 209
2023 +16.7% 244
2024 +6.2% 259

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 448 business establishments in ZIP 08550, employing approximately 4,146 people with a combined annual payroll of $223,048,000.

448

Businesses

4,146

Employees

$223.0M

Annual Payroll

15

Industry Sectors

Industry Establishments % of Total
Professional, scientific, and technical services 159 35.5%
Health care and social assistance 59 13.2%
Accommodation and food services 36 8.0%
Other services (except public administration) 36 8.0%
Educational services 25 5.6%
Retail trade 20 4.5%
Finance and insurance 18 4.0%
Administrative and support and waste management and remediation services 16 3.6%
Construction 15 3.4%
Arts, entertainment, and recreation 14 3.1%
Wholesale trade 13 2.9%
Real estate and rental and leasing 13 2.9%
Manufacturing 8 1.8%
Transportation and warehousing 7 1.6%
Information 6 1.3%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 08550 vs 08561 →

ZIP 08550 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 08550 ranks #6 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 08550 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 08550 ranks the highest of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
08561 Windsor, NJ 226 2.9 mi
08536 Plainsboro, NJ 20,073 4.1 mi
08691 Trenton, NJ 15,104 5.1 mi
08690 Trenton, NJ 18,567 4.5 mi
08528 Kingston, NJ 315 7.3 mi
08648 Lawrence Township, NJ 32,263 5.5 mi
08520 Hightstown, NJ 27,869 4.9 mi
08542 Princeton, NJ 5,189 5.5 mi
08619 Trenton, NJ 22,723 5.0 mi
08540 Princeton, NJ 47,115 6.0 mi

More ZIP Codes in Mercer County

08540 standard
Princeton, NJ
Pop: 47,115
08618 standard
Trenton, NJ
Pop: 38,229
08648 standard
Lawrence Township, NJ
Pop: 32,263
08610 standard
Trenton, NJ
Pop: 30,468
08611 standard
Trenton, NJ
Pop: 28,038
08520 standard
Hightstown, NJ
Pop: 27,869

Related Areas

Mercer County Princeton Junction, NJ New Jersey

Frequently Asked Questions

What county is ZIP code 08550 in? ▼
ZIP code 08550 (Princeton Junction) is located in Mercer County, New Jersey. Mercer County contains multiple ZIP codes, see the full list at /counties/mercer-nj.
What is the population of ZIP code 08550? ▼
ZIP code 08550 in Princeton Junction, NJ has a population of 19,445 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 08550? ▼
The median household income in ZIP 08550 is $224,213, which is 194% above the national average of $76,288.
What is the average home value in ZIP 08550? ▼
The median home value in ZIP 08550 is $807,200, which is 190% above the national average of $278,155.
What is the demographic makeup of ZIP 08550? ▼
The largest racial group in ZIP 08550 is Asian at 55.0%. Hispanic or Latino residents make up 4.8% of the population.
How many businesses are in ZIP code 08550? ▼
ZIP code 08550 has 448 business establishments employing approximately 4,146 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 08550? ▼
The top industries by establishment count in ZIP 08550 are: Professional, scientific, and technical services (159), Health care and social assistance (59), Accommodation and food services (36). There are 15 industry sectors represented in total.
How have home values changed in ZIP code 08550? ▼
According to the FHFA House Price Index, home values in ZIP 08550 increased by 6.2% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 159%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 08550? ▼
In ZIP code 08550, 90.9% of residents aged 25+ have a high school diploma or higher, and 85.5% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 08550? ▼
The mean commute time for workers in ZIP code 08550 is 43.1 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 08550? ▼
In ZIP code 08550, approximately 76.1% of occupied housing units are owner-occupied and 23.9% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 08550? ▼
The poverty rate in ZIP code 08550 is 2.5% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.