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 3,189 as of July 1, 2016. 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, 2016.

Neighborhood Data

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Monmouth Junction Census Designated Place, NJ Boundary Map

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Boundary Maps: Township of South Brunswick | Middlesex County | New Jersey Counties

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Monmouth Junction, NJ Data & Demographics (As of July 1, 2016)


Total Population 3,189
Population in Households 3,189
Population in Familes 3,024
Population in Group Qrtrs 0
Population Density1 2,174
Diversity Index2 64


Total Households 985
Average Household Size 3.24
Family Households 869
Average Family Size 3


Total Housing Units 1,014 (100%)
Owner Occupied HU 916 (90.3%)
Renter Occupied HU 69 ( 6.8%)
Vacant Housing Units 29 ( 2.9%)
Median Home Value $411,714
Average Home Value $430,862


Median Household Income $113,918
Average Household Income $147,906
Per Capita Income $46,154
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 1.6% 1.46%
Households 1.4% 1.32%
Families 1.31% 1.34%
Median Household Income   1.73%
Per Capita Income   1.7%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

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, 2016 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 # 337 38th
Population Density1 # 316 42nd
Diversity Index2 # 120 78th
Median Household Income # 86 84th
Per Capita Income # 158 71st

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