Rocky Hill, NJ Profile: Facts & Data

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Rocky Hill, New Jersey - Basic Facts

The Borough of Rocky Hill had a population of 690 as of July 1, 2020. Rocky Hill ranks in the lower quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in New Jersey. See peer rankings below.

The primary coordinate point for Rocky Hill is located at latitude 40.3998 and longitude -74.6343 in Somerset County. The formal boundaries for the Borough of Rocky Hill encompass a land area of 0.62 sq. miles and a water area of 0 sq. miles. Somerset County is in the Eastern time zone (GMT -5). The elevation is 85 feet.

The Borough of Rocky Hill (GNIS ID: 885376) 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.

Alternate Unofficial Names for Rocky Hill: Rockyhill.

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Rocky Hill, NJ Data & Demographics (As of July 1, 2020)

POPULATION

Total Population 690 (100%)
Population in Households 675 (97.8%)
Population in Families 560 (81.2%)
Population in Group Quarters1 15 ( 2.2%)
Population Density 1,130
Diversity Index2 32
 
 

INCOME

Median Household Income $120,740
Average Household Income $157,943
% of Income for Mortgage4 19%
Per Capita Income $64,362
Wealth Index5 231
 

HOUSING

Total HU (Housing Units) 292 (100%)
Owner Occupied HU 211 (72.3%)
Renter Occupied HU 70 (24.0%)
Vacant Housing Units 11 ( 3.8%)
Median Home Value $539,530
Average Home Value $559,716
Housing Affordability Index3 102
 

HOUSEHOLDS

Total Households 281
Average Household Size 2.4
Family Households 189
Average Family Size 3
NOTES
  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.

GROWTH RATE / YEAR

2010-2020 2020-2025
Population 0.11% -0.23%
Households 0.03% -0.21%
Families 0.0% -0.21%
Median Household Income   1.04%
Per Capita Income   1.94%
Owner Occupied HU   0.0%

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Rocky Hill, NJ - Peer Comparisons by Rank and Percentile

The table below compares Rocky Hill to the other 545 incorporated cities, towns and CDPs in New Jersey by rank and percentile using July 1, 2020 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 # 484 11th
Population Density # 417 24th
Median Household Income # 113 79th
Housing Affordability Index # 149 27th
Per Capita Income # 91 83rd
Diversity Index # 361 34th

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

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