Mountainside borough is located in Union County New Jersey. Mountainside borough has a 2024 population of 6,911. Mountainside borough is currently declining at a rate of -0.19% annually and its population has decreased by -1.1% since the most recent census, which recorded a population of 6,988 in 2020.
The average household income in Mountainside borough is $235,424 with a poverty rate of 2.85%. The median age in Mountainside borough is 48.7 years: 49.7 years for males, and 45.3 years for females.
According to the most recent ACS, the racial composition of Mountainside borough was:
Race | Population | Percentage (of total) |
|---|---|---|
| White | 5,245 | 75.28% |
| Asian | 859 | 12.33% |
| Two or more races | 783 | 11.24% |
| Black or African American | 77 | 1.11% |
| Other race | 3 | 0.04% |
| Native American | 0 | 0% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
White
Asian
Two or more races
Black or African American
Other race
Native American
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 2,540 | 2.69 | 86.9 | 13.1 |
| Married | 1,962 | 3.05 | 87.5 | 12.5 |
| Non Family | 426 | 1.12 | 79.1 | 20.9 |
| Female | 128 | 2.44 | 100 | 0 |
| Male | 24 | 2.08 | 100 | 0 |
3
Average Family Size
2.69
Average Household Size
86.9%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Education Attained | Count | Percentage |
|---|---|---|
| 9th to 12th Grade | 20 | 0.4% |
| Associates Degree | 294 | 5.87% |
| Bachelors Degree | 1,466 | 29.25% |
| Graduate Degree | 1,850 | 36.91% |
| High School Graduate | 615 | 12.27% |
| Less Than 9th Grade | 155 | 3.09% |
| Some College | 612 | 12.21% |
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
Race | Total | High School | Bachelors |
|---|---|---|---|
| White | 3,721 | 3,675 | 2,493 |
| Hispanic | 693 | 687 | 431 |
| Asian | 594 | 471 | 455 |
| 2+ Races | 523 | 523 | 340 |
| Black | 67 | 67 | 0 |
| Other Race | 1 | 1 | 1 |
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%.
All
Male
Female
Name | Average | Male | Female |
|---|---|---|---|
| Bachelors Degree | $130,341 | $175,350 | $96,250 |
| Graduate Degree | $165,223 | $215,755 | $98,299 |
| High School Graduate | $54,342 | $54,890 | $0 |
| Less Than 9th Grade | $0 | $0 | $0 |
| Overall | $104,750 | $165,417 | $79,886 |
| Some College | $0 | $80,203 | $0 |
$104,750
Average Earnings
$165,417
Average Male
$79,886
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
76.14% of Mountainside borough residents speak only English, while 23.86% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 9.38% of the population.
rate
Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| White | 5,015 | 195 | 3.89% |
2.85%
Overall Poverty Rate
2.85%
Male Poverty Rate
2.84%
Female Poverty Rate
The race most likely to be in poverty in Mountainside borough is White, with 3.89% below the poverty level.
The race least likely to be in poverty in Mountainside borough is White, with 3.89% 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 1.62%, and for those that did not work, the poverty rate was 8.9%.
rate
Rate | Poverty |
|---|---|
| High School | 8.02% |
| Some College | 5.13% |
| Bachelors or Greater | 2.19% |
| Less Than 9th Grade | 0% |
rate
Rate | Poverty |
|---|---|
| Male Employed | 1.22% |
| Male Unemployed | 0% |
| Female Employed | 0% |
| Female Unemployed | 0% |
Households
Families
MarriedFamilies
NonFamilies
Name | Median | Mean |
|---|---|---|
| Families | $226,389 | $254,559 |
| Households | $210,100 | $235,424 |
| Married Families | $247,888 | $-999,999,999 |
| Non Families | - | $140,209 |
mean
median
Married
Widowed
Divorced
Separated
NeverMarried
74.2%
Overall Marriage Rate
75.0%
Male Marriage Rate
73.3%
Female Marriage Rate
male
female
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.
Married
Widowed
Divorced
Separated
NeverMarried
Second Gulf War
First Gulf War
Vietnam
Korea
World War II
316
Number of Veterans
284
Male Veterans
32
Female Veterans
War | Veterans |
|---|---|
| Vietnam | 95 |
| Korea | 73 |
| World War II | 39 |
| Second Gulf War | 15 |
| First Gulf War | 15 |
count
Age Group | Veterans |
|---|---|
| 75+ | 265 |
| 65 to 74 | 36 |
| 35 to 54 | 15 |
| 18 to 34 | 0 |
| 55 to 64 | 0 |
count
Name | Veterans | % of Total |
|---|---|---|
| White | 291 | 7.2% |
| 2+ Races | 25 | 4.42% |
| Hispanic | 25 | 3.39% |
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
12.66%
Veteran Poverty Rate
46.84%
Veteran Disability Rate
LaborForceParticipation
59.8%
Labor Force Participation
58.6%
Employment Rate
2.1%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
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.
Europe
Asia
Africa
Oceania
Latin America
North America
57.79%
Born in Mountainside borough
81.46%
Native Born
18.54%
Foreign Born
8.4%
Non Citizen
10.15%
Naturalized
81.46% of Mountainside borough residents were born in the United States, with 57.79% having been born in New Jersey. 8.4% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.
Year | Population | Growth | Change |
|---|---|---|---|
| 2029 | 6,846 | -13 | -0.19% |
| 2028 | 6,859 | -13 | -0.19% |
| 2027 | 6,872 | -13 | -0.19% |
| 2026 | 6,885 | -13 | -0.19% |
| 2025 | 6,898 | -13 | -0.19% |
| 2024 | 6,911 | -13 | -0.19% |
| 2023 | 6,924 | -13 | -0.19% |
| 2022 | 6,937 | -71 | -1.01% |
| 2021 | 7,008 | 20 | 0.29% |
| 2020 | 6,988 | 100 | 1.45% |
| 2019 | 6,888 | 22 | 0.32% |
| 2018 | 6,866 | 25 | 0.37% |
| 2017 | 6,841 | 17 | 0.25% |
| 2016 | 6,824 | 38 | 0.56% |
| 2015 | 6,786 | 10 | 0.15% |
| 2014 | 6,776 | -6 | -0.09% |
| 2013 | 6,782 | 49 | 0.73% |
| 2012 | 6,733 | 21 | 0.31% |
| 2011 | 6,712 | 44 | 0.66% |
| 2010 | 6,668 | 0 | 0% |