The Borough of Mountainside had a population of 6,692 as of July 1, 2021.
The primary coordinate point for Mountainside is located at latitude 40.6723 and longitude -74.3574 in Union County. The formal boundaries for the Borough of Mountainside encompass a land area of 4.01 sq. miles and a water area of 0.04 sq. miles. Union County is in the Eastern time zone (GMT -5). The elevation is 141 feet.
The Borough of Mountainside has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.
|Total Population||6,692 (100%)|
|Population in Households||6,547 (97.8%)|
|Population in Families||5,785 (86.4%)|
|Population in Group Quarters1||145 ( 2.2%)|
|Median Household Income||$142,459|
|Average Household Income||$188,886|
|% of Income for Mortgage4||19%|
|Per Capita Income||$69,734|
|Total HU (Housing Units)||2,596 (100%)|
|Owner Occupied HU||2,238 (86.2%)|
|Renter Occupied HU||231 ( 8.9%)|
|Vacant Housing Units||127 ( 4.9%)|
|Median Home Value||$650,052|
|Average Home Value||$707,247|
|Housing Affordability Index3||115|
|Average Household Size||2.65|
|Average Family Size||3|
GROWTH RATE / YEAR
|Median Household Income||0.82%|
|Per Capita Income||0.98%|
|Owner Occupied HU||0.04%|
The table below compares Mountainside to the other 545 incorporated cities, towns and CDPs in New Jersey by rank and percentile using July 1, 2021 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.
|Total Population||# 217||60th|
|Population Density||# 363||34th|
|Median Household Income||# 72||87th|
|Housing Affordability Index||# 231||42nd|
|Per Capita Income||# 75||86th|
|Diversity Index||# 331||39th|
Additional comparisons and rankings can be made with a VERY EASY TO USE New Jersey Census Data Comparison Tool.