East Rocky Hill CDP, NJ Profile: Facts, Map & Data


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East Rocky Hill CDP, New Jersey - Basic Facts

The East Rocky Hill Census Designated Place had a population of 502 as of July 1, 2017. East Rocky Hill CDP ranks in the lower quartile for Population Density and 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 East Rocky Hill CDP is located at latitude 40.4152 and longitude -74.618 in Somerset County. The formal boundaries for the East Rocky Hill Census Designated Place (see map below) encompass a land area of 4.16 sq. miles and a water area of 0.09 sq. miles.

The East Rocky Hill Census Designated Place (GNIS ID: 2583986) has a U2 Census Class Code which indicates a census designated place without an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The East Rocky Hill Census Designated Place is located within Township of Franklin, a minor civil division (MCD) of Somerset County.

Beneath the boundary map are tables with East Rocky Hill CDP 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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East Rocky Hill Census Designated Place, NJ Boundary Map

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East Rocky Hill CDP, NJ Data & Demographics (As of July 1, 2017)


Total Population 502
Daytime Population: Workers 88
Daytime Population: Residents 261
Total Daytime Population (TDP) 349
Ratio TDP/Total Population1 0.70
Population in Households 502
Population in Familes 450
Population in Group Qrtrs 0
Population Density2 121
Diversity Index3 70


Median Household Income $132,875
Average Household Income $211,340
Per Capita Income $70,050


Total Housing Units 178 (100%)
Owner Occupied HU 144 (80.9%)
Renter Occupied HU 22 (12.4%)
Vacant Housing Units 12 ( 6.7%)
Median Home Value $562,500
Average Home Value $561,364


Total Households 166
Average Household Size 3.02
Family Households 132
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 0.94% 0.78%
Households 0.51% 0.6%
Families 1.92% 0.6%
Median Household Income   2.9%
Per Capita Income   1.87%

East Rocky Hill CDP, NJ - Peer Comparisons by Rank and Percentile

The table below compares East Rocky Hill CDP 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 # 498 9th
Population Density # 536 2nd
Diversity Index # 95 83rd
Median Household Income # 47 92nd
Per Capita Income # 44 92nd

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

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