City profile · New Jersey · Census ACS 2023

Mountainside, NJ

Population, income, housing, safety, climate and schools for Mountainside - drawn straight from Census ACS, FBI UCR, NOAA, NCES, HUD and FEMA, refreshed on the 2024–2025 release cycle.

6,967
Residents
$210,100
Median income
$755,600
Median home
$2,205
Median rent (state)

Mountainside - the verdict

Mountainside ranks in the 98th percentile for household income and the 91st percentile for safety nationally, out of every US city with at least 1,000 residents. Source: Census ACS + FBI UCR.

98th
percentile, household income
94th
percentile, home value
86th
percentile, median rent
91st
percentile, safety
📝 How we sourced this

Population, income, and housing-cost figures come from the U.S. Census Bureau American Community Survey 5-year estimates (B-series tables). Crime data uses FBI UCR; climate uses NOAA Climate Normals; school counts come from NCES Common Core of Data; permits use the Census Building Permits Survey (BPS). See our methodology page for the full ETL pipeline and OMB / FIPS join keys.

Data Snapshot: Mountainside, NJ

Mountainside is a small town in New Jersey, home to 6,967 residents per U.S. Census Bureau ACS 2023 estimates. The typical household in Mountainside brings in $210,100 a year, placing it in the top quartile of U.S. cities for household income, with a poverty rate of 3.0%. Mountainside's housing stock carries a median value of $755,600, and the median resident age is 48.7 years. About 66.2% of adults hold a bachelor's degree or higher, while 58.6% of working-age residents are in the labor force.

In 2024, 8 residential building permits were authorized in Mountainside (Building Boom), up 300% from five years earlier, per Census BPS data. Mountainside reports a comparatively low crime rate: FBI UCR reporting places total crime at 354.5 incidents per 100,000 residents, below the national average (voluntary agency reporting, reflects reporting activity, not a definitive danger score).

New Jersey carries a cost-of-living premium: BEA Regional Price Parities 2024 puts New Jersey at 108.8 on a 100-equals-national-average scale (Well Above Average). HUD Fair Market Rent for a typical two-bedroom in this state is $2,205 per month. EIA 2023 residential energy data puts New Jersey's average monthly utility costs around $275 (state average). On FEMA's National Risk Index, this area rates 95.5 out of 100 for natural-hazard exposure (Very High).

Population

6,967 residents

Census ACS 2023 - New Jersey

Median Household Income

$210,100 /yr

Poverty 3.0%

Cost of Living Index (state)

108.8 (US=100)

Well Above Average - BEA RPP 2024, New Jersey average

How does Mountainside compare to other US cities?

Where Mountainside sits among all US cities (population 1,000+) on each measure, computed live from Census and FBI data.

Household income 98% higher than other cities
Home value 94% pricier than other cities
Median rent 86% pricier than other cities
Safety 91% safer than other cities

"Safer than" reflects total crime rate from FBI UCR; the others use Census ACS estimates.

Zoom in to just New Jersey and the picture shifts: Mountainside ranks #30 of 238 New Jersey cities by lowest crime rate, a different read than the national percentile above.

How we calculate these percentiles & ranks

Each percentile compares Mountainside against every qualifying US city; each in-state rank narrows that to New Jersey only. Full formula and direction notes: methodology.

New Jersey-relative analysis

Median Home Value places Mountainside toward the top of New Jersey's cities

Among the 672 New Jersey cities PlainCities tracks with reported median home value data, Mountainside ranks #80 - the 88th percentile within the state. This is a different, narrower cut than the nationwide percentiles above: it compares Mountainside only against its own state's cities, not the full US field.

Median Household Income
#41 of 659
94th percentile in New Jersey
Median Gross Rent
#298 of 686
41st percentile in New Jersey
Median Home Value
#80 of 672
88th percentile in New Jersey
Poverty Rate
#347 of 680
48th percentile in New Jersey
Bachelor's Degree or Higher
#109 of 686
84th percentile in New Jersey

Ranked by raw value (highest first); a higher rank is not automatically "better" for every measure, see each metric's own context above. This is a comparison within New Jersey only, not a livability score. See the methodology for the source and calculation.

98thIncome percentile
91stSafety percentile

98th percentile nationally for median household income · 91st percentile for safety (lower crime rate). Source: Census ACS 2023 / FBI UCR 2023.

Mountainside's profile vs. every US city

Income, affordability, and safety percentile

Mountainside's percentile rank on 3 favorable-direction measures (income, affordability, safety) vs. every tracked US city -- higher on every axis is more favorable. Not a composite quality score, just the arithmetic mean of the axes shown. 3-axis radar comparing 1 series across Income, Affordability, Safety. IncomeAffordabilitySafety 66 Avg. percentile National median
Mountainside's percentile rank on 3 favorable-direction measures (income, affordability, safety) vs. every tracked US city -- higher on every axis is more favorable. Not a composite quality score, just the arithmetic mean of the axes shown.

How Mountainside's home value compares nationally

Median home value vs. every US city (population 1,000+)

$755,600 6th percentile more affordable than 6% of 15,600 US cities

$0–$25,000: 5 US cities (0%). Below this entry. $25,000–$50,000: 54 US cities (0%). Below this entry. $50,000–$75,000: 352 US cities (2%). Below this entry. $75,000–$100,000: 1,086 US cities (7%). Below this entry. $100,000–$125,000: 1,516 US cities (10%). Below this entry. $125,000–$150,000: 1,170 US cities (8%). Below this entry. $150,000–$175,000: 1,278 US cities (8%). Below this entry. $175,000–$200,000: 1,229 US cities (8%). Below this entry. $200,000–$225,000: 1,035 US cities (7%). Below this entry. $225,000–$250,000: 976 US cities (6%). Below this entry. $250,000–$275,000: 754 US cities (5%). Below this entry. $275,000–$300,000: 712 US cities (5%). Below this entry. $300,000–$325,000: 521 US cities (3%). Below this entry. $325,000–$350,000: 526 US cities (3%). Below this entry. $350,000–$375,000: 465 US cities (3%). Below this entry. $375,000–$400,000: 393 US cities (3%). Below this entry. $400,000–$425,000: 317 US cities (2%). Below this entry. $425,000–$450,000: 300 US cities (2%). Below this entry. $450,000–$475,000: 307 US cities (2%). Below this entry. $475,000–$500,000: 250 US cities (2%). Below this entry. $500,000–$525,000: 160 US cities (1%). Below this entry. $525,000–$550,000: 156 US cities (1%). Below this entry. $550,000–$575,000: 172 US cities (1%). Below this entry. $575,000–$600,000: 172 US cities (1%). Below this entry. $600,000–$625,000: 163 US cities (1%). Below this entry. $625,000–$650,000: 167 US cities (1%). Below this entry. $650,000–$675,000: 135 US cities (1%). Below this entry. $675,000–$700,000: 101 US cities (1%). Below this entry. $700,000–$725,000: 95 US cities (1%). Below this entry. $725,000–$750,000: 71 US cities (0%). Below this entry. $750,000–$775,000: 65 US cities (0%). This entry sits in this band. $775,000–$800,000: 70 US cities (0%). Above this entry. $800,000–$825,000: 57 US cities (0%). Above this entry. $825,000–$850,000: 67 US cities (0%). Above this entry. $850,000–$875,000: 60 US cities (0%). Above this entry. $875,000–$900,000: 58 US cities (0%). Above this entry. $900,000–$925,000: 47 US cities (0%). Above this entry. $925,000–$950,000: 37 US cities (0%). Above this entry. $950,000–$975,000: 31 US cities (0%). Above this entry. $975,000–$1,000,000: 470 US cities (3%). Above this entry. $1,000,000–$1,025,000: 0 US cities (0%). Above this entry. Mountainside $0 $1,025,000 every US city, bucketed by value

Each bar is a $25K-wide band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau ACS 5-Year Estimates · 2023

Income distribution context

Household income distribution - Mountainside, NJ Mountainside, NJ's reported median household income shown against the U.S. national quintile-share pattern (not Mountainside, NJ-specific quintile data). The Lorenz curve traces the national cumulative income share against cumulative population share, perfect equality is the diagonal; observed inequality bows below. $ Household Income Distribution Mountainside, NJ median $210,100/yr, vs. U.S. national quintile pattern QUINTILE SHARE OF AGGREGATE INCOME Lowest 20% 3.4% Second 20% 9.2% Middle 20% 15.1% Fourth 20% 23.2% Top 20% 49.1% LORENZ CURVE cumulative income vs. population 100% 0% 100% pop. 0%
Mountainside, NJ's median household income (Census ACS 5-year estimate) plotted against the U.S. national income-quintile distribution pattern for context; the quintile shares and Lorenz curve are national figures, not computed specifically for Mountainside, NJ. Diagonal = perfect equality.

Key socioeconomic indicators

Bachelor's degree or higher (adults 25+) 66.2%

Census ACS S1501, educational attainment

Poverty rate (households below FPL) 3.0%

Census ACS S1701, poverty status

Labor force participation (adults 16+) 58.6%

Census ACS S2301, share of working-age residents in the labor force

Population
6,967
Median Income
$210,100
Median Home Value
$755,600
Median Age
48.7
Poverty Rate
3.0%
Labor force participation
58.6%
Bachelor's Degree+
66.2%

Safety & Crime

Total Crime Rate
354.5
per 100,000 residents
Violent Crime
14.2
per 100,000 residents
Property Crime
340.3
per 100,000 residents

Reflects incidents reported to the FBI's Uniform Crime Reporting program — agency participation is voluntary and reporting completeness varies by jurisdiction and year, so this reflects reporting activity, not a definitive danger score. Not adjusted for tourism, commuter, or daytime population.

Schools

Total Schools
2
Public schools in this city

Population Change

Annual U.S. Census Bureau Population Estimates Program (PEP) estimates, 2020–2025

See the fastest-growing cities →
6,800 residents7,000 residents7,200 residents7,400 residents 202020212022202320242025 7,007 residents 7,346 residents ▲ +4.8%
Mountainside's Census PEP population estimates, 2020–2025.

Housing Supply

Census Bureau Building Permits Survey (BPS) - annual residential permits authorized

📈 Building Boom
Total Permits (2024)
8
housing units authorized
Single-Family
8
detached homes
Multifamily
0
apartments & condos
Supply Intensity
1.1
permits per 1,000 residents

5-Year Permit Trend (2019–2024)

Year Total
2019 2
2020 4
2021 2
2022 3
2023 2
2024 8

Permit volume increased 300% from 2019 to 2024.

Commute Patterns

How workers travel to work, Census ACS 2023

Drive Alone
52.7%
Carpool
9.1%
Public Transit
11.9%
Walk
1.7%
Work from Home
24.6%

Based on 3,238 workers 16 and over.

Monthly Utility Costs

State-average estimates for New Jersey - EIA 2023 residential energy data

Electricity
$120
avg/month
Natural Gas
$95
avg/month
Water & Sewer
$60
avg/month
Total Utilities
$275
estimated/month

Estimates reflect New Jersey state averages. Actual costs vary by home size, usage, and local rates. Source: U.S. Energy Information Administration (EIA) 2023.

Living Costs & Risk

Cost of living is a New Jersey state average from BEA; rent and hazard risk are county-level figures from HUD and FEMA for the county Mountainside sits in

Cost of Living Index
108.8
Well Above Average
US average = 100 · BEA RPP 2024
Typical 2-BR Rent
$2,205/mo
HUD Fair Market Rent
County-level FMR estimate
Natural Hazard Risk
95.5 / 100
Very High
FEMA NRI composite score (county)

Similar Cities in New Jersey

Stratford
6,965 people
Linwood
6,954 people
Milltown
6,994 people
Midland Park
6,996 people
Lincroft
6,901 people
Barrington
7,047 people

Cities of a Similar Size Nationwide

Population-matched peers from other states, closest to Mountainside's 6,967 residents (Census ACS 5-Year 2023).

Seneca Falls, NY
6,967 people
Perry, FL
6,965 people
Kasson, MN
6,964 people
Garden Home-Whitford, OR
6,970 people
Sudden Valley, WA
6,963 people
Ormond-by-the-Sea, FL
6,962 people

Cities with a Similar Household Income Nationwide

Median-household-income-matched peers from other states, closest to Mountainside's $210,100 (Census ACS 5-Year 2023, table B19013).

Marshfield Hills, MA
$210,096 median income
Franklin Farm, VA
$210,169 median income
Fort Hunt, VA
$210,471 median income
Bard College, NY
$210,483 median income
Poplar Plains, CT
$210,625 median income
Sully Square, VA
$210,746 median income

Race & Ethnicity Composition

Race and ethnicity - Mountainside, NJ Race categories sum to one hundred percent per Census methodology. Hispanic or Latino is shown separately as an ethnicity overlay; it cuts across all race categories per OMB Directive 15. Race & Ethnicity Composition Mountainside, NJ - Census ACS, OMB race + ethnicity categories RACE, sums to 100% 75.3% 12.3% 11.2% ETHNICITY, Hispanic or Latino (any race) 13.6% White 75.3% Black or African American 1.1% Asian 12.3% American Indian 0.0% Native Hawaiian 0.0% Some other race 0.0% Two or more races 11.2% Per OMB Directive 15: Hispanic/Latino ethnicity is reported separately from the race categories.
Race categories sum to 100%. Hispanic or Latino ethnicity is reported separately and cuts across race per Census/OMB methodology.

City-level race and ethnicity, Census ACS 5-year 2023 (tables B02001, B03001), OMB Directive 15 categories.

How Mountainside compares to nearby New Jersey cities

Population + median household income, sourced from Census Bureau ACS 5-year B01001 (population) and B19013 (median household income).

City Population Median Household Income
Mountainside (this city) 6,967 $210,100
Stratford 6,965 $100,735
Linwood 6,954 $135,904
Milltown 6,994 $119,958
Census ACS 5-year FIPS NJ FBI UCR NCES CCD Census BPS 2024 OMB Bulletin 23-01

What do people ask about Mountainside, NJ?

What is the population of Mountainside, NJ? +

The population of Mountainside, NJ stands at 6,967 according to U.S. Census Bureau ACS 2023 estimates.

What is the median household income in Mountainside, NJ? +

Median annual household income in Mountainside runs $210,100, based on Census ACS 2023 data.

What is the cost of living in Mountainside? +

BEA does not publish a city-level cost-of-living figure for Mountainside; the closest available measure is the New Jersey state average, a cost of living index of 108.8 (U.S. average = 100), rated "Well Above Average" based on BEA Regional Price Parities 2024 data. Costs within New Jersey vary by metro area.

Is Mountainside, NJ safe? +

Mountainside has a total crime rate of 354.5 per 100,000 residents, which is below the national average. This reflects incidents reported to the FBI UCR program, not a definitive safety score -- agency reporting is voluntary and completeness varies by jurisdiction.

What is the median home value in Mountainside, NJ? +

Homes in Mountainside carry a median value of $755,600, according to Census ACS 2023 estimates.

Source: U.S. Census Bureau ACS 5-Year 2023, FBI UCR, NCES CCD, Census BPS 2024, Census ACS B08301/B08136, U.S. Energy Information Administration (EIA) 2023, BEA Regional Price Parities 2024, HUD Fair Market Rents 2026, FEMA National Risk Index.

Read our methodology - how this data is sourced, computed, and verified.

Primary sources: Census ACS, FBI UCR, NOAA Climate Normals, NCES.

Citation & verification links Data sourced from the U.S. Census Bureau. See our methodology for details. Retrieved and formatted by PlainCities

Verify with HUD →

Verify with FBI →

Verify with NOAA →

Verify with U.S. Census Bureau →

Verify with EPA →

Verify with FEMA →

Verify with BEA →

Verify with EIA →

Verify with NCES →

Every figure on PlainCities is rendered directly from Census ACS source data, no number is typed in by an editor. This page draws directly on Census ACS source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.