Mendham, NJ Profile: Facts & Data


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Mendham, New Jersey - Basic Facts

The Borough of Mendham had a population of 4,954 as of July 1, 2022. Mendham ranks in the lower quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in New Jersey. See peer rankings below.

The primary coordinate point for Mendham is located at latitude 40.7759 and longitude -74.6007 in Morris County. The formal boundaries for the Borough of Mendham encompass a land area of 5.95 sq. miles and a water area of 0.05 sq. miles. Morris County is in the Eastern time zone (GMT -5). The elevation is 614 feet.

The Borough of Mendham 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.

Alternate Unofficial Names for Mendham: Mendam, Mendom, Mendum, Rocksiticus, Roxiticus.

Jump to... (On This Page!)
  1. Mendham 2022 Demographic Data
  2. Growth Rates for Mendham (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 - 2022 Demographics

Mendham, NJ Data & Demographics (As of July 1, 2022)


Total Population 4,954 (100%)
Population in Households 4,745 (95.8%)
Population in Families 4,253 (85.8%)
Population in Group Quarters1 209 ( 4.2%)
Population Density 835
Diversity Index2 32


Median Household Income $178,690
Average Household Income $251,028
% of Income for Mortgage4 21%
Per Capita Income $88,997
Wealth Index5 353


Total HU (Housing Units) 1,863 (100%)
Owner Occupied HU 1,502 (80.6%)
Renter Occupied HU 253 (13.6%)
Vacant Housing Units 108 ( 5.8%)
Median Home Value $701,379
Average Home Value $810,819
Housing Affordability Index3 106


Total Households 1,755
Average Household Size 2.70
Family Households 1,331
Average Family Size 3.00
  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.


2020-2022 2022-2027
Population -0.24% -0.13%
Households -0.18% -0.11%
Families   -0.12%
Median Household Income   2.19%
Per Capita Income   2.47%
Owner Occupied HU   0.08%

Mendham, NJ - Peer Comparisons by Rank and Percentile

The table below compares Mendham to the other 701 incorporated cities, towns and CDPs in New Jersey by rank and percentile using July 1, 2022 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 # 290 59th
Population Density # 524 25th
Median Household Income # 50 93rd
Housing Affordability Index # 342 49th
Per Capita Income # 51 93rd
Diversity Index # 567 19th

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

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