HomeNew JerseyUnion CountyMountainside
Mountainside, New Jersey: commercial real estate data.
Mountainside is a Census borough of 7,049 people across 4.00 square miles of land, in Union County. Median household income is $211,538, 87.9 percent of occupied homes are owned, and the SBA record carries 20 7(a) approvals to borrowers here worth $5.0 m since FY2020.
Underlined figures are computed by MMCG Analytics, not published by the agency.
Mountainside
What Mountainside is
- Census place typeborough
- Land area4 sq mi
- Water area0.05 sq mi
- Population per square mile of land1,764
- County holding the largest share of its areaUnion County, 100.0 percent
US Census Bureau, cartographic boundary file, places, 2024 vintage. US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Mountainside
How many people live in Mountainside
- Population7,049
- Median age48.0
- Population under 181,535
- Share under 1821.8 percent
- Population 65 and over1,709 plus or minus 411
- Share 65 and over24.2 percent plus or minus 5.8
- Households2,508
- Family households2,086
- Share of households that are families83.2 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Mountainside
Income and work in Mountainside
- Median household income$211,538 plus or minus $63,184
- Per capita income$84,985
- Civilian labor force3,471
- Employed3,351
- Unemployed120 plus or minus 63
- Unemployment rate3.5 percent plus or minus 1.8
- Adults 25 and over5,094
- Adults 25 and over with a high school diploma or higher96.2 percent
- Adults 25 and over with a bachelor degree or higher67.3 percent
- Adults 25 and over with a graduate degree38.0 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Mountainside
Housing in Mountainside
- Housing units2,567
- Occupied units2,508
- Vacant units59 plus or minus 70
- Vacancy rate2.3 percent plus or minus 2.7
- Owner occupied2,204
- Renter occupied304 plus or minus 206
- Ownership rate87.9 percent
- Median owner-occupied home value$810,300
- Median gross rent, monthly$3,501
- Annual rent as a share of median income19.9 percent
- Single family units2,530
- Share single family98.6 percent
- Units in buildings of two or more37 plus or minus 46
- Share in buildings of two or more1.4 percent plus or minus 1.8
- Mobile homes0
- Median year structure built1957
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Mountainside
How Mountainside gets to work
- Workers 16 and over who commute2,494
- Commuting under 15 minutes607 plus or minus 214
- Share commuting under 15 minutes24.3 percent plus or minus 7.9
- Commuting 30 minutes or more1,392 plus or minus 288
- Share commuting 30 minutes or more55.8 percent
- Drove alone54.2 percent
- Carpooled10.8 percent plus or minus 5.7
- Public transport8.1 percent plus or minus 3.9
- Walked1.4 percent plus or minus 1.1
- Worked from home25.1 percent plus or minus 10.2
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Mountainside
SBA loans in Mountainside (7(a))
- Approvals20
- Gross approval$4,978,300
- Average approval$248,915
- Median approval$177,200
- Ninetieth percentile approval$565,570
- Largest approval$636,000
- Jobs supported71
- Jobs per approval3.5
- Loans with a final outcome2
- Paid in full0
- Charged off2
- Median term120 months
- Share on real estate terms of 20 years or more10.0 percent
- Share to franchises25.0 percent
- Distinct lenders13
- Distinct industries by NAICS16
Counted by borrower city: approvals to borrowers whose address is in Mountainside, in any county, FY2020 to FY2026. Only 2 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 7(a) FOIA release, FY2020 to FY2026 year to date, as of 2026-06-30.
Mountainside
SBA loans in Mountainside (504)
- Approvals5
- Gross approval$6,207,000
- Average approval$1,241,400
- Median approval$829,000
- Largest approval$2,758,000
- Jobs supported124
- Loans with a final outcome1
- Charged off0
- Median term240 months
- Distinct CDCs3
Counted by borrower city: approvals to borrowers whose address is in Mountainside, in any county, FY2010 to FY2026. Only 1 loan has reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 504 FOIA release, FY2010 to FY2026 year to date, as of 2026-06-30.
Mountainside
Flood risk in Mountainside
- NFIP communityBorough of Mountainside
- NFIP community number340468
- Participating in the NFIPYes
- Community Rating System classNone
- Currently effective map date09/20/06
The Borough of Mountainside participates in the National Flood Insurance Program as community 340468 and carries no Community Rating System class, so no CRS premium discount applies to it.
Federal Emergency Management Agency, NFIP Community Status Book (OpenFEMA), as of 2026-09-26.
Union County, not Mountainside
Union County context, not Mountainside figures
- Establishments in Union County14,276
- Covered employment, Union County229,010
- Average annual pay, Union County$84,322
- Housing units permitted, Union County1,696
Every figure in this section is published for Union County as a whole and is not a measurement of Mountainside.
US Census Bureau, County Business Patterns, 2023. US Bureau of Labor Statistics, Quarterly Census of Employment and Wages, 2024 annual averages. US Census Bureau, Building Permits Survey, 2024 annual.
Coverage
What this page does not hold.
Parcel detail, zoning and the flood zone at an address are not on this page; they resolve at the address in the platform. How this page was built →
Common questions
Mountainside questions, answered from the record.
How many people live in Mountainside, New Jersey?
7,049, in 2,508 households. Mountainside borough covers 4.00 square miles of land, which is 1,764 people per square mile. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
What county is Mountainside in?
Union County, which holds 100.0 percent of the place by area. Source: US Census Bureau, cartographic boundary file, places, 2024 vintage.
What is the median household income in Mountainside?
$211,538. The median owner-occupied home is valued at $810,300. Median gross rent is $3,501 per month. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
How much SBA lending goes to Mountainside businesses?
20 7(a) approvals totaling $5.0 m since FY2020, across 13 lenders, median approval $177,200, plus 5 504 approvals worth $6.2 m since FY2010. These count approvals to borrowers whose address is in Mountainside, not projects sited inside the place boundary, and they are approvals recorded in the release rather than loans disbursed.
Do SBA loans to Mountainside borrowers get paid back?
No rate is published for Mountainside. Only 2 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published. The counts are shown instead.
Is Mountainside in the National Flood Insurance Program?
Yes. Mountainside appears in the FEMA Community Status Book as Mountainside, borough of, community 340468, with no Community Rating System class, so no CRS discount applies. Whether a specific parcel sits in a mapped special flood hazard area is an address level question the platform answers.
Are the county figures on this page Mountainside figures?
No, and they are labeled so. County Business Patterns, QCEW, the Building Permits Survey, BEA product and IRS migration are published for Union County as a whole and there is no place level equivalent. They appear in one clearly marked section as context and are never presented as measurements of Mountainside.
Is zoning published for Mountainside?
No. Nothing on this page presents parcel level zoning.