Mountainside is home to 7,049 people in New Jersey. Households here earn about 104% more than in New Jersey as a whole. 67% of adults hold a bachelor's degree, against 36% nationally. The median household earns $211,538, about 157% above the national median. Median rent is $3,500+ a month. Home values have more than doubled since 2000, reaching $810,300.
At a glance
Wealthier
median household income $211,538, above the US median
US median: $82,259
Older
median age 48.0
US median: 38.9
More educated
67% hold a bachelor's degree
US average: 36%
Less affordable
home values up 29%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Mountainside
What changed most since 1990
Median home value (2024 dollars)$686,180 → $810,300(+18%)US over the same years: +67%
Homes owned by their occupants96.2% → 87.9%(−8.3 pts)US over the same years: +0.9 pts
Adults with a bachelor's degree44.1% → 67.3%(+23.2 pts)US over the same years: +15.3 pts
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)5.8%(14)
US avg: 26.4%
Gulf War (1990s)5.8%(14)
US avg: 24.3%
Vietnam era28.5%(69)
US avg: 33.1%
Korean War24%(58)
US avg: 4.5%
World War II14.9%(36)
US avg: 1%
Share of the 242 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Mountainside, decade by decade
Mountainside population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
6,657
$179,115
$686,180
44.1%
11.6
2000
6,602
$177,056
$628,107
47.9%
17.7
2010
6,685
$167,176
$909,177
55.0%
31.6
2020
7,020
$146,865
$772,554
57.5%
46.6
2024
7,049
$211,538
$810,300
67.3%
57.5
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
