Martinsville, NJ Profile: Facts & Data


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Martinsville, New Jersey - Basic Facts

The Martinsville Census Designated Place had a population of 12,013 as of July 1, 2020. Martinsville ranks in the lower quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in New Jersey. See peer rankings below.

The primary coordinate point for Martinsville is located at latitude 40.6012 and longitude -74.559 in Somerset County. The formal boundaries for the Martinsville Census Designated Place encompass a land area of 12.32 sq. miles and a water area of 0.08 sq. miles. Somerset County is in the Eastern time zone (GMT -5). The elevation is 338 feet.

The Martinsville Census Designated Place (GNIS ID: 2584010) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The Martinsville Census Designated Place is located within Township of Bridgewater, a minor civil division (MCD) of Somerset County.

Alternate Unofficial Names for Martinsville: Martinville.


Martinsville, NJ Data & Demographics (As of July 1, 2020)


Total Population 12,013 (100%)
Population in Households 11,961 (99.6%)
Population in Families 10,878 (90.6%)
Population in Group Quarters1 52 ( 0.4%)
Population Density 989
Diversity Index2 38


Median Household Income $153,314
Average Household Income $222,590
% of Income for Mortgage4 16%
Per Capita Income $80,337
Wealth Index5 358


Total HU (Housing Units) 4,535 (100%)
Owner Occupied HU 3,992 (88.0%)
Renter Occupied HU 337 ( 7.4%)
Vacant Housing Units 206 ( 4.5%)
Median Home Value $581,099
Average Home Value $626,597
Housing Affordability Index3 141


Total Households 4,329
Average Household Size 2.76
Family Households 3,487
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.


2010-2020 2020-2025
Population 0.04% -0.11%
Households 0.0% -0.13%
Families 0.01% -0.14%
Median Household Income   0.89%
Per Capita Income   1.37%
Owner Occupied HU   -0.07%


Martinsville, NJ - Peer Comparisons by Rank and Percentile

The table below compares Martinsville to the other 545 incorporated cities, towns and CDPs in New Jersey by rank and percentile using July 1, 2020 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 # 107 81st
Population Density # 431 21st
Median Household Income # 53 90th
Housing Affordability Index # 356 65th
Per Capita Income # 33 94th
Diversity Index # 314 42nd

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

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