Mountainside, New Jersey Population 2024

6,912

Mountainside is a city located in Union County New Jersey. Mountainside has a 2024 population of 6,912. Mountainside is currently declining at a rate of -0.32% annually and its population has decreased by -1.29% since the most recent census, which recorded a population of 7,002 in 2020.

The average household income in Mountainside is $214,930 with a poverty rate of 2.41%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Mountainside is 50.1 years, 52 years for males, and 49.4 years for females.

Mountainside Demographics

According to the most recent ACS, the racial composition of Mountainside was:

  • White: 76.96%
  • Asian: 11.47%
  • Two or more races: 10.4%
  • Black or African American: 1.16%
  • Other race: 0.01%
  • Native American: 0%
  • Native Hawaiian or Pacific Islander: 0%
Land Area (mi²)
4.0 sq mi
Density (mi²)
1,729.60/sq mi
Growth Since 2020
-1.29% (-90)
The current population of Mountainside, New Jersey is 6,912 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 7,002.

Mountainside, New Jersey Population 2024

Population by Race

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Race
Population
Percentage (of total)
White5,38076.96%
Asian80211.47%
Two or more races72710.4%
Black or African American811.16%
Other race10.01%
Native American00%
Native Hawaiian or Pacific Islander00%

White

Asian

Two or more races

Black or African American

Other race

Native American

Native Hawaiian or Pacific Islander

Mountainside Population by Race

Mountainside Population Pyramid 2024

Mountainside Median Age

50.1

Total

52

Male

49.4

Female

Mountainside Adults

There are 5,305 adults, (1,778 of whom are seniors) in Mountainside.

Mountainside Age Dependency

98.2

Age Dependency Ratio

50.4

Old Age Dependency Ratio

47.8

Child Dependency Ratio

Mountainside Sex Ratio

Female3,74353.54%
Male3,24846.46%

Mountainside Population by Age

Mountainside Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All2,5372.784.415.6
Married1,8893.1590.49.6
Non Family5241.1359.240.8
Female1122.461000
Male122.751000

3.09

Average Family Size

2.7

Average Household Size

84.4%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Mountainside Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Mountainside Educational Attainment by Sex (over 25)

Mountainside Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among black people with a rate of 100%.

The highest rate of bachelors degrees is among other race people with a rate of 100%.

Mountainside Educational Attainment by Race

All

Male

Female

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$93,191

Average Earnings

$143,233

Average Male

$77,051

Average Female

Mountainside Earnings by Educational Attainment

Mountainside Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Mountainside Language

76.72% of Mountainside residents speak only English, while 23.28% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 9.02% of the population.

Mountainside Language

Mountainside Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White5,1991573.02%
Asian79891.13%

2.41%

Overall Poverty Rate

2.58%

Male Poverty Rate

2.27%

Female Poverty Rate

Poverty in Mountainside

The race most likely to be in poverty in Mountainside is White, with 3.02% below the poverty level.

The race least likely to be in poverty in Mountainside is Asian, with 1.13% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0%. Among those working part-time, it was 1.53%, and for those that did not work, the poverty rate was 6.86%.

Mountainside Poverty

rate

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Rate
Poverty
High School5.54%
Less Than 9th Grade4.89%
Some College4.54%
Bachelors or Greater1.7%

Mountainside Poverty Rate by Education

rate

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Rate
Poverty
Male Employed1.11%
Male Unemployed0%
Female Employed0%
Female Unemployed0%

Mountainside Poverty Rate by Employment Status and Sex

Mountainside Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Mountainside Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

71.2%

Overall Marriage Rate

76.3%

Male Marriage Rate

66.7%

Female Marriage Rate

Mountainside Married by Age and Sex

male

female

Mountainside Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 35-44.

Mountainside Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Mountainside Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

279

Number of Veterans

254

Male Veterans

25

Female Veterans

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Mountainside Veterans by War

count

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Mountainside Veterans by Age

count

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Mountainside Veterans by Race

Mountainside Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

6.45%

Veteran Poverty Rate

50.18%

Veteran Disability Rate

Mountainside Veterans by Education

LaborForceParticipation

57.6%

Labor Force Participation

55.6%

Employment Rate

3.4%

Unemployment Rate

Mountainside Employment by Age

LaborForceParticipation

Mountainside Employment by Race

LaborForceParticipation

Mountainside Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

57.92%

Born in Mountainside

81.78%

Native Born

18.22%

Foreign Born

8.22%

Non Citizen

10%

Naturalized

Place of Birth

81.78% of Mountainside residents were born in the United States, with 57.92% having been born in New Jersey. 8.22% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Mountainside Place of Birth

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
20296,799-23-0.34%
20286,822-22-0.32%
20276,844-23-0.33%
20266,867-22-0.32%
20256,889-23-0.33%
20246,912-22-0.32%
20236,934-23-0.33%
20226,957-65-0.93%
20217,022200.29%
20207,0021141.66%
20196,888220.32%
20186,866250.37%
20176,841170.25%
20166,824380.56%
20156,786100.15%
20146,776-6-0.09%
20136,782490.73%
20126,733210.31%
20116,712440.66%
20106,66800%
20006,602-55-0.83%
19906,657-461-6.48%
19807,118-402-5.35%
19707,5201,19518.89%
19606,325-474-6.97%
showing: 25 rows

Mountainside Population by Year