Princeton, New Jersey Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Princeton, NJ Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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A+
Health Top grade
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B
Income Around average
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A+
Education Top grade
Source: Map AI Methodology
Population
| Metric | Princeton | New Jersey Avg | U.S. Average |
|---|---|---|---|
| Population | 30,756 | 9,334,304 | 337,468,954 |
| Population density (per sq mi) | 1670.5 | 1071.4 | 86.4 |
| Population growth (%/yr) | -0.10% | 0.59% | 0.59% |
| Median age | 27.5 | 40.2 | 37.3 |
| Households | 9,222 | 3,503,323 | 130,235,071 |
Population in Princeton declined by 0.2% from 2009 to 2024, reaching 30,756 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Princeton is Gen Z, aged 13–28, at 36.1% of residents. That is 15.9 points above New Jersey as a whole.
- Gen Z 13–28 11,088 36.1% +15.9 pts
- Millennials 29–44 4,575 14.9% -6.9 pts
- Gen X 45–60 6,045 19.7% -1.8 pts
- Boomers 61–79 4,194 13.6% -3.2 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below New Jersey, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 50.2% of the people living in Princeton and men 49.8%.
- Women 50.2% New Jersey 50.9%
- Men 49.8% New Jersey 49.1%
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Economy
Princeton has a the economy index of B, which means it is quite prosperous.
| Metric | Princeton | New Jersey Avg | U.S. Average |
|---|---|---|---|
| Median household income | $195,703 | $103,817 | $80,455 |
| Income growth (%/yr) | 6.78% | 4.37% | 4.80% |
| Unemployment rate | 4.3% | 6.3% | 5.2% |
The median household income in Princeton is about 89% higher than in New Jersey.
Housing
| Metric | Princeton | New Jersey Avg | U.S. Average |
|---|---|---|---|
| Median home price | $247,618 | $352,792 | $248,835 |
| Median rent | $2,636 | $1,719 | $1,407 |
| Homeownership rate | 55.4% | 63.8% | 65.2% |
The median home price in Princeton is about 7.8 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $2,636 per month for that long.
Commute Time & Mobility
Commuters in Princeton spend about 33 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 137 hours, about 5.7 full days, spent commuting.
| Metric | Princeton | New Jersey Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 16.5 | 26.2 | 22.4 |
| Round-trip commute (min) | 32.9 | 52.4 | 44.8 |
| Yearly time spent (hours) | 137 | 218 | 187 |
| Estimated yearly cost | $4,250 | $6,764 | $5,790 |
| Work from home | 32.7% | 16.8% | 15.0% |
| Highway traffic (vehicles/day) | 17,339 | 14,317 | 8,813 |
| Local road traffic (vehicles/day) | 1,546 | 2,109 | 1,355 |
The average commute time in Princeton is 16 minutes, shorter than the 26 minutes in New Jersey.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Princeton has a education index of A+, which means it is exceptionally educated.
| Metric | Princeton | New Jersey Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 64.0% | 39.6% | 31.6% |
| Average household size | 2.54 | 2.61 | 2.53 |
Health
Princeton has a health index of A+, which means it is exceptionally healthy.
| Metric | Princeton | New Jersey Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 85.2 | 79.4 | 78.3 |
| Self-rated poor health | 7.2% | 12.9% | 16.3% |
| Smokers | 7.6% | 14.2% | 19.0% |
Frequently Asked Questions
Common questions about Princeton, New Jersey.
How many people live in Princeton, New Jersey?
About 30,756 people live in Princeton, New Jersey, in 9,222 households of 2.5 people on average. The median age is 27.5, so residents are younger than the U.S. median of 37.3 by about 10 years.
Is Princeton, New Jersey mostly urban or rural?
Averaged over its land area, Princeton, New Jersey has 1,671 people per square mile, a density typical of urban and suburban areas. That is about 19 times the U.S. average of 86.
How affordable is housing in Princeton, New Jersey?
The median home costs 1.3 times the median household income ($247,618 against $195,703), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $2,636 a month takes about 16% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
How common is a college degree in Princeton, New Jersey?
64.0% of adults in Princeton, New Jersey hold a bachelor's degree or higher (about 6 in 10), well above the U.S. share of 31.6%.
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