Mount Arlington, NJ Profile: Facts & Data


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Mount Arlington, New Jersey - Basic Facts

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The Borough of Mount Arlington had a population of 5,770 as of July 1, 2021.

The primary coordinate point for Mount Arlington is located at latitude 40.9259 and longitude -74.6349 in Morris County. The formal boundaries for the Borough of Mount Arlington encompass a land area of 2.17 sq. miles and a water area of 0.68 sq. miles. Morris County is in the Eastern time zone (GMT -5). The elevation is 1,014 feet.

The Borough of Mount Arlington 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.

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  1. Mount Arlington 2021 Demographic Data
  2. Growth Rates for Mount Arlington (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. New Jersey Research Tools (Easy Tools & Current Data)
  3. New Jersey Data Comparison Tool - 2021 Demographics

Mount Arlington, NJ Data & Demographics (As of July 1, 2021)


Total Population 5,770 (100%)
Population in Households 5,766 (99.9%)
Population in Families 4,412 (76.5%)
Population in Group Quarters1 4 ( 0.1%)
Population Density 2,696
Diversity Index2 39


Median Household Income $84,249
Average Household Income $116,670
% of Income for Mortgage4 17%
Per Capita Income $53,868
Wealth Index5 158


Total HU (Housing Units) 2,952 (100%)
Owner Occupied HU 1,746 (59.1%)
Renter Occupied HU 918 (31.1%)
Vacant Housing Units 288 ( 9.8%)
Median Home Value $341,667
Average Home Value $404,539
Housing Affordability Index3 106


Total Households 2,664
Average Household Size 2.16
Family Households 1,563
Average Family Size 3
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2010-2021 2021-2026
Population 1.19% 0.81%
Households 1.38% 0.91%
Families 1.33% 0.9%
Median Household Income   0.94%
Per Capita Income   2.09%
Owner Occupied HU   1.51%

Mount Arlington, NJ - Peer Comparisons by Rank and Percentile

The table below compares Mount Arlington 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.

Variable Description Rank Percentile
Total Population # 242 56th
Population Density # 251 54th
Median Household Income # 302 45th
Housing Affordability Index # 173 32nd
Per Capita Income # 175 68th
Diversity Index # 312 43rd

Additional comparisons and rankings can be made with a VERY EASY TO USE New Jersey Census Data Comparison Tool.

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