Mountainside vs Union

A side-by-side comparison of Mountainside and Union: population, income, housing, and more.

Mountainside and Union are places in New Jersey. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Mountainside has the higher population (6,967 vs 3,284 in Union). Mountainside has the higher median household income ($210,100 vs $127,411 in Union). Mountainside has the higher median home value ($755,600 vs $451,500 in Union).

Population, income & housing

	Mountainside	Union
Population	6,967	3,284
Median age	48.7 yrs	47.0 yrs
Median household income	$210,100	$127,411
Median home value	$755,600	$451,500
Median gross rent	$3,501	$1,695
Housing units	2,616	1,182
Homeownership rate	86.9%	68.4%
Bachelor's degree or higher	66.2%	34.9%
Unemployment rate	2.1%	16.1%

Trends (ACS 5-year, 2019–2023)

	Mountainside	Union
Population	6,826 → 6,967 (+2.1%)	2,591 → 3,284 (+26.7%)
Median household income	$119,000 → $210,100 (+76.6%)	$92,232 → $127,411 (+38.1%)
Median home value	$626,100 → $755,600 (+20.7%)	$363,400 → $451,500 (+24.2%)
Median gross rent	$1,739 → $3,501 (+101.3%)	$1,426 → $1,695 (+18.9%)

Mountainside

Population

6,8266,967

Median household income

$119,000$210,100

Median home value

$626,100$755,600

Median gross rent

$1,739$3,501

Union

Population

2,5913,284

Median household income

$92,232$127,411

Median home value

$363,400$451,500

Median gross rent

$1,426$1,695

Age & race/ethnicity

Age distribution (share)

	Mountainside	Union
Under 5	8.6%	2.0%
5 to 17	15.7%	8.0%
18 to 24	3.8%	6.8%
25 to 34	2.5%	25.0%
35 to 44	16.1%	7.9%
45 to 54	12.2%	20.6%
55 to 64	17.5%	17.8%
65 to 74	14.2%	3.7%
75 and over	9.4%	8.1%

Race & ethnicity (share)

	Mountainside	Union
White (non-Hispanic)	72.7%	11.6%
Black or African American	1.1%	50.5%
American Indian & Alaska Native	0.0%	0.0%
Asian	11.4%	10.4%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	6.4%
Two or more races	1.1%	0.4%
Hispanic or Latino	13.6%	20.7%

Educational attainment (age 25+)

Share of adults 25+

	Mountainside	Union
No high school diploma	3.5%	23.3%
High school graduate	12.3%	17.8%
Some college or associate's	18.1%	23.9%
Bachelor's degree	29.2%	25.1%
Graduate or professional degree	36.9%	9.8%

Commute to work

How workers get to work (share)

	Mountainside	Union
Drove alone	52.7%	74.8%
Carpooled	9.1%	9.9%
Public transit	11.9%	7.0%
Walked	1.7%	2.7%
Bicycle	0.0%	0.0%
Worked from home	24.6%	3.6%
Other means	0.0%	2.1%

Housing

Units in structure (share)

	Mountainside	Union
1-unit, detached	96.9%	45.4%
1-unit, attached	1.4%	0.0%
2 to 4 units	1.7%	40.4%
5 to 19 units	0.0%	10.4%
20 or more units	0.0%	3.8%
Mobile home & other	0.0%	0.0%

Poverty & households

	Mountainside	Union
Poverty rate	2.8%	9.6%
Average household size	2.69	2.87
Mean commute (minutes)	39	31
Median year structure built	1958	1946