Mountainside
A borough in Union County, New Jersey — population 6,876 as of 2020.
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This Afternoon
80°F
Mostly Sunny4% precip
Tonight
64°F
Partly Cloudy then Slight Chance Rain Showers15% precip
Monday
73°F
Slight Chance Rain Showers then Sunny15% precip
Monday Night
51°F
Clear
In and around Mountainside
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Mountainside by the numbers
Population
6,876Population figure, 2020
Households & income
- Area
- 4 sq mi (10.35 km²), 0.05 sq mi water
- Median age
- 48
- Households
- 2,508
- Persons per household
- 2.8
- Median household income
- $211,538
- Median house value
- $810,300
Municipal office
- Office
- MUNICIPAL CLERK
- Address
- 1385 US HIGHWAY 22, MOUNTAINSIDE, NJ 07092