Princeton, NJ Profile: Facts & Data


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Princeton, New Jersey - Basic Facts

The Princeton had a population of 30,908 as of July 1, 2023.

The primary coordinate point for Princeton is located at latitude 40.3487 and longitude -74.659 in Mercer County. The formal boundaries for the Princeton encompass a land area of 17.93 sq. miles and a water area of 0.43 sq. miles. Mercer County is in the Eastern time zone (GMT -5).

The Princeton has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Jump to... (On This Page!)
  1. Princeton 2023 Demographic Data
  2. Growth Rates for Princeton (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. New Jersey Research Tools (Easy Tools & Current Data)
  3. New Jersey Data Comparison Tool - 2023 Demographics

Princeton, NJ Data & Demographics (As of July 1, 2023)


Total Population 30,908 (100%)
Population in Households 24,096 (78.0%)
Population in Families 18,674 (60.4%)
Population in Group Quarters1 6,812 (22.0%)
Population Density 1,722
Diversity Index2 68


Median Household Income $167,886
Average Household Income $247,674
% of Income for Mortgage4 32%
Per Capita Income $77,740
Wealth Index5 254
Socioeconomic Status Index6 High (65.5)


Total HU (Housing Units) 10,469 (100%)
Owner Occupied HU 5,439 (52.0%)
Renter Occupied HU 4,068 (38.9%)
Vacant Housing Units 962 ( 9.2%)
Median Home Value $898,420
Average Home Value $1,024,719
Housing Affordability Index3 73


Total Households 9,507
Average Household Size 2.53
Family Households 5,778
Average Family Size 3.00
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.


2020-2023 2023-2028
Population 0.23% 0.29%
Households 0.44% 0.56%
Families   0.64%
Median Household Income   2.66%
Per Capita Income   2.21%
Owner Occupied HU   0.40%

Princeton, NJ - Peer Comparisons by Rank and Percentile

The table below compares Princeton to the other 700 incorporated cities, towns and CDPs in New Jersey by rank and percentile using July 1, 2023 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 31 96th
Population Density # 405 42nd
Median Household Income # 70 90th
Housing Affordability Index # 227 32nd
Per Capita Income # 108 85th
Diversity Index # 181 74th

Additional comparisons and rankings can be made with a VERY EASY TO USE New Jersey Census Data Comparison Tool.

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