Monmouth Junction, NJ Profile: Facts, Map & Data


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Monmouth Junction, New Jersey - Basic Facts

The Monmouth Junction Census Designated Place had a population of 3,199 as of July 1, 2017. Monmouth Junction ranks in the upper quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in New Jersey. See peer rankings below.

The primary coordinate point for Monmouth Junction is located at latitude 40.3803 and longitude -74.5432 in Middlesex County. The formal boundaries for the Monmouth Junction Census Designated Place (see map below) encompass a land area of 1.47 sq. miles and a water area of 0.01 sq. miles. Middlesex County is in the Eastern time zone (GMT -5). The elevation is 102 feet.

The Monmouth Junction Census Designated Place (GNIS ID: 2389493) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The Monmouth Junction Census Designated Place is located within Township of South Brunswick, a minor civil division (MCD) of Middlesex County.

Beneath the boundary map are tables with Monmouth Junction population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

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Monmouth Junction Census Designated Place, NJ Boundary Map

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Monmouth Junction, NJ Data & Demographics (As of July 1, 2017)


Total Population 3,199
Daytime Population: Workers 1,173
Daytime Population: Residents 1,553
Total Daytime Population (TDP) 2,726
Ratio TDP/Total Population1 0.85
Population in Households 3,199
Population in Familes 3,034
Population in Group Qrtrs 0
Population Density2 2,181
Diversity Index3 64


Median Household Income $117,954
Average Household Income $153,486
Per Capita Income $47,817


Total Housing Units 1,002 (100%)
Owner Occupied HU 917 (91.5%)
Renter Occupied HU 70 ( 7.0%)
Vacant Housing Units 15 ( 1.5%)
Median Home Value $406,250
Average Home Value $424,646


Total Households 987
Average Household Size 3.24
Family Households 870
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. 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 race 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.


2010-2017 2017-2022
Population 1.43% 1.23%
Households 1.23% 1.09%
Families 1.15% 1.1%
Median Household Income   2.21%
Per Capita Income   2.61%

Monmouth Junction, NJ - Peer Comparisons by Rank and Percentile

The table below compares Monmouth Junction to the other 545 incorporated cities, towns and CDPs in New Jersey by rank and percentile using July 1, 2017 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 # 338 38th
Population Density # 313 43rd
Diversity Index # 120 78th
Median Household Income # 82 85th
Per Capita Income # 150 73rd

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

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