Mountainside

Population

6,876 (2020)

Type

Borough

Area

4 sq mi (10.35 km²), 0.05 sq mi water

Median age

47.3

Households

2,486

Persons per household

2.6

Median household income

$130,345

Average house value

$636,700

Businesses

354

Employees

5,263

Government

BOROUGH OF MOUNTAINSIDE

Government office

1385 US HIGHWAY 22, MOUNTAINSIDE, NJ 07092