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Mountainside, NJ Profile: Facts & Data

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Mountainside, New Jersey - Basic Facts

The Borough of Mountainside had a population of 7,012 as of July 1, 2024.

The primary coordinate point for Mountainside is located at latitude 40.6723 and longitude -74.3574 in Union County. The formal boundaries for the Borough of Mountainside encompass a land area of 4.01 sq. miles and a water area of 0.04 sq. miles. Union County is in the Eastern time zone (GMT -5).

The Borough of Mountainside 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. Mountainside 2024 Demographic Data
  2. Growth Rates for Mountainside (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 - 2024 Demographics
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Mountainside, NJ Data & Demographics (As of July 1, 2024)

POPULATION

Total Population 7,012 (100%)
Population in Households 6,789 (96.8%)
Population in Families 6,203 (88.5%)
Population in Group Quarters1 223 ( 3.2%)
Population Density 1,755
Diversity Index2 49
 
 

INCOME

Median Household Income $200,001
Average Household Income $262,933
% of Income for Mortgage4 22%
Per Capita Income $88,996
Wealth Index5 286
Socioeconomic Status Index6 High (70.5)
 

HOUSING

Total HU (Housing Units) 2,534 (100%)
Owner Occupied HU 2,256 (89.0%)
Renter Occupied HU 116 ( 4.6%)
Vacant Housing Units 162 ( 6.4%)
Median Home Value $694,282
Average Home Value $751,086
Housing Affordability Index3 95
 

HOUSEHOLDS

Total Households 2,372
Average Household Size 2.86
Family Households 1,912
Average Family Size 3.00
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.
  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.

GROWTH RATE / YEAR

 2020-2024 2024-2029
Population -0.03% -0.07%
Households -0.27% -0.17%
Families   -0.18%
Median Household Income   0.00%
Per Capita Income   2.16%
Owner Occupied HU   -0.03%

Mountainside, NJ - Peer Comparisons by Rank and Percentile

The table below compares Mountainside to the other 700 incorporated cities, towns and CDPs in New Jersey by rank and percentile using July 1, 2024 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 # 229 67th
Population Density # 399 43rd
Median Household Income # 8 95th
Housing Affordability Index # 539 77th
Per Capita Income # 67 91st
Diversity Index # 400 43rd

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

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