Martinsville, NJ Profile: Facts & Data

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 Martinsville Census Designated Place 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.

A Census Designated Place (CDP) is a statistical counterpart to a self-governing (incorporated) place such as a city, town, or village. A CDP is not a legal entity and has no governmental functions.

Martinsville, NJ Data & Demographics (As of July 1, 2025)

POPULATION
Total Population	12,010 (100%)
Population in Households	11,918 (99.2%)
Population in Families	10,843 (90.3%)
Population in Group Quarters¹	92 ( 0.8%)
Population Density	988
Diversity Index²	53


INCOME
Median Household Income	$207,623
Average Household Income	$265,362
% of Income for Mortgage⁴	22%
Per Capita Income	$95,358
Wealth Index⁵	303
Socioeconomic Status Index⁶	High (68.5)

HOUSING
Total HU (Housing Units)	4,415 (100%)
Owner Occupied HU	4,086 (92.5%)
Renter Occupied HU	228 ( 5.2%)
Vacant Housing Units	101 ( 2.3%)
Median Home Value	$742,389
Average Home Value	$819,342
Housing Affordability Index³	94

HOUSEHOLDS
Total Households	4,314
Average Household Size	2.76
Family Households	3,422
Average Family Size	3.00

NOTES

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.
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.
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.
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).
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.
The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

Martinsville, NJ - Peer Comparisons by Rank and Percentile

The table below compares Martinsville to the other 700 incorporated cities, towns and CDPs in New Jersey by rank and percentile using July 1, 2025 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.

GROWTH RATE / YEAR	2020-2025	2025-2030
Population	-0.22%	-0.19%
Households	0.07%	0.04%
Families		0.17%
Median Household Income		2.08%
Per Capita Income		1.79%
Owner Occupied HU		0.11%

Variable Description	Rank	Percentile
Total Population	# 114	84th
Population Density	# 506	28th
Median Household Income	# 49	93rd
Housing Affordability Index	# 553	79th
Per Capita Income	# 46	94th
Diversity Index	# 369	48th

Martinsville, NJ Profile: Facts & Data

Martinsville, New Jersey - Basic Facts

Martinsville, NJ Data & Demographics (As of July 1, 2025)

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

Martinsville, NJ - Peer Comparisons by Rank and Percentile

Martinsville, NJ - Most Popular Things to Do

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