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Princeton, NJ
Mercer County, New Jersey. ZIP codes: 08540, 08542, 08544.
Population
30,756
Land area
17.9sq mi
People per sq mi
1,714
ZIP codes
3
Princeton and its ZIP codes
Princeton at a glance
- Princeton is 35% denser than New Jersey as a whole.
- By population, it ranks 31st among 700 cities and towns in New Jersey.
- The median household income is $192,079, 85% above the New Jersey median of $103,556.
- A typical owner-occupied home is valued at $1,050,600 (about 2.3 times the New Jersey figure) and median rent is $2,636 a month.
Local data for Princeton, NJ
Counts from official public data
Housing and community stats
Princeton, NJ, American Community Survey 2020-2024
Median household income
$192,079
Poverty rate
6.1%
Median home value
$1,050,600
Median rent
$2,636/mo
Homeownership
55.4%
Bachelor's or higher
84.7%
Median age
28.5
Average commute
24.2 min
Largest reported origins and ancestries: Chinese Americans (3,087), German Americans (3,010), Irish Americans (2,903).
Economy and federal money
Jobs, pay, income and spending are for Mercer County. PPP loans are for Princeton.
Unemployment rate
4.2%
Sep 2026, -1.7 pts in a year
Average annual pay
$94,418
261,312 jobs, 2025
Income per person
$87,068
BEA, 2024
Federal spending
$4.7B
FY 2026, $12,169 per person
PPP loans
$433M
2,595 loans, 35,359 jobs reported
How people get to work
Princeton, NJ, workers 16 and older. American Community Survey 5-year estimates
- Drove alone32.1%
- Carpooled2.1%
- Public transit7.7%
- Walked19.9%
- Bicycle4.6%
- Taxi, ride-hailing, motorcycle or other1.0%
- Worked from home32.7%
Average one-way commute: 24.2 minutes for people who do not work from home.
Environment and hazard risk
Princeton, NJ, from FEMA, NOAA and EPA
Natural hazard risk
Relatively High
Top: strong wind
Storm events since 1996
1,115
Countywide, mostly thunderstorm wind
Flood insurance policies
1,294
1.2% of homes, county
July high / Jan low
87° / 21°F
47.5 inches of rain a year
Hazards, floods and storm historyCheck a flood zone4 historic places
Health statistics
Share of adults in Princeton, NJ, CDC PLACES estimates
Obesity
18.3%
U.S. 33.3% -15.0 pts
Diabetes
6.9%
U.S. 12.1% -5.2 pts
Smoking
5.7%
U.S. 12.8% -7.1 pts
Uninsured (18-64)
6.0%
U.S. 11.1% -5.1 pts
ZIP codes in Princeton
3 in or overlapping Princeton. Population shown
Cities near Princeton
| Name | Distance | Land area (sq mi) |
|---|---|---|
| Princeton JunctionCensus-designated place | 3.3 mi | 1.8 |
| Rocky HillBorough | 3.7 mi | 0.6 |
| KingstonCensus-designated place | 3.7 mi | 1.9 |
| BlawenburgCensus-designated place | 4 mi | 0.6 |
| Plainsboro CenterCensus-designated place | 4.2 mi | 0.7 |
| East Rocky HillCensus-designated place | 4.7 mi | 4.2 |
| LawrencevilleCensus-designated place | 5.1 mi | 1 |
| SkillmanCensus-designated place | 5.4 mi | 1.5 |
| Princeton MeadowsCensus-designated place | 5.6 mi | 2.5 |
| HopewellBorough | 5.6 mi | 0.7 |
| HeathcoteCensus-designated place | 5.7 mi | 3.1 |
| Monmouth JunctionCensus-designated place | 6.1 mi | 4.4 |
| Ten Mile RunCensus-designated place | 6.5 mi | 2.5 |
| PenningtonBorough | 6.7 mi | 1 |
| HarlingenCensus-designated place | 6.9 mi | 0.8 |
| Kendall ParkCensus-designated place | 6.9 mi | 3.8 |
Frequently asked questions
- What county is Princeton, NJ in?
- Princeton is in Mercer County, New Jersey.
- What ZIP codes are in Princeton, NJ?
- ZIP codes in or overlapping Princeton include 08540, 08542, 08544.
- What is the population of Princeton, NJ?
- About 30,756 people live in Princeton, based on American Community Survey 5-year estimates.
- What cities are near Princeton?
- Nearby places include Princeton Junction (3.3 mi), Rocky Hill (3.7 mi), Kingston (3.7 mi), Blawenburg (4 mi), Plainsboro Center (4.2 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023