Census-designated place · New Jersey
Martinsville, New Jersey
Martinsville, census-designated place, in Somerset County, New Jersey. Martinsville had 11,559 people in the ACS 2020-2024 5-year estimates (±765). GEOID 3444430.
Residents, 2020-2024
11,559
±765 (90% margin)
2020 Census count: 12,147
Median household income
$205,000
±$22,676 (90% margin)
New Jersey: $103,556
Median home value
$720,400
±$26,428 (90% margin)
New Jersey: $454,400
Median gross rent
$2,171
±$314 (90% margin)
New Jersey: $1,720
Where is Martinsville and what county is it in?
Martinsville is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Somerset County, New Jersey. It covers 12.2 square miles of land, 1,000 residents per square mile in 2020.
Martinsville is in the New York-Newark-Jersey City, NY-NJ metropolitan statistical area, which takes in 22 counties (Census Bureau delineation, July 2023).
Martinsville lies entirely within Bridgewater Township, a township with its own local government (2020 census blocks).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Martinsville, and is it growing?
The 2020-2024 American Community Survey puts Martinsville's population at 11,559 (±765). The 2020 Census counted 12,147 residents.
The Census Bureau publishes yearly population estimates for incorporated places only; Martinsville is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Martinsville | Somerset County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 11,559 ±765 | 349,846 | no clear change |
| Households | 4,054 ±270 | 130,802 | no clear change |
| Average household size | 2.82 ±0.13 | 2.64 | no clear change |
| Housing units | 4,173 ±265 | 133,639 | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Martinsville?
The median resident of Martinsville is 45.1 years old; 24.0% are under 18 and 21.7% are 65 or older. The largest group is non-Hispanic white residents at 65.6%, then non-Hispanic Asian residents at 16.8%. 18.7% of residents were born outside the United States.
| Measure | Martinsville | Somerset County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 45.1 ±3.2 | 41.8 | no clear change |
| Under 18 years | 24.0% ±2.5 pts | 21.2% | – |
| 65 years and over | 21.7% ±2.4 pts | 17.0% | – |
| Male | 50.7% ±2.3 pts | 49.3% | – |
| Hispanic or Latino (any race) | 8.0% ±2.9 pts | 17.6% | +4.7 pts |
| White alone, not Hispanic | 65.6% ±4.7 pts | 49.3% | −14.5 pts |
| Black or African American alone, not Hispanic | 1.0% ±0.8 pts | 9.3% | – |
| Asian alone, not Hispanic | 16.8% ±3.1 pts | 19.6% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.4 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.4 pts | 0.0% | – |
| Two or more races, not Hispanic | 7.4% ±2.6 pts | 3.6% | – |
| Some other race alone, not Hispanic | 1.2% ±1.3 pts | 0.7% | – |
| Born outside the United States | 18.7% ±2.9 pts | 27.9% | no clear change |
| Speak a language other than English at home (age 5+) | 22.1% ±3.6 pts | 34.7% | – |
| Civilian veterans (age 18+) | 3.4% ±1.4 pts | 3.2% | – |
| With a disability | 7.3% ±2.0 pts | 8.6% | – |
| No health insurance coverage | 0.7% ±0.6 pts | 5.4% | – |
| High school graduate or higher (age 25+) | 98.6% ±0.7 pts | 94.0% | – |
| Bachelor's degree or higher (age 25+) | 70.9% ±3.7 pts | 57.8% | +5.5 pts |
| Graduate or professional degree (age 25+) | 33.1% ±3.8 pts | 26.6% | – |
| Lived in the same house a year earlier | 97.4% ±1.4 pts | 90.9% | – |
| Moved from another state in the past year | 0.2% ±0.2 pts | 1.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Martinsville earn?
Half of Martinsville's 4,054 households earn less than $205,000 a year (±$22,676), against $140,374 in Somerset County and $103,556 in New Jersey. In 2015-2019 it was $192,391 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Martinsville | Somerset County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $205,000 ±$22,676 | $140,374 | no clear change |
| Mean household income | $257,831 ±$19,021 | $191,543 | – |
| Per capita income | $91,066 ±$7,127 | $72,193 | no clear change |
| People below the poverty line | 1.4% ±1.1 pts | 5.4% | – |
| Children under 18 below the poverty line | 1.9% ±2.3 pts | 6.7% | – |
| Households receiving SNAP | 2.4% ±1.8 pts | 3.7% | – |
| Households with a computer | 98.9% ±0.9 pts | 97.7% | – |
| Households with a broadband subscription | 97.3% ±1.8 pts | 95.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Martinsville?
Owners occupy 96.0% of Martinsville's occupied homes and renters 4.0%. The median owner-occupied home is valued at $720,400 by its owner (±$26,428). The median renter pays $2,171 a month including utilities.
| Measure | Martinsville | Somerset County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $720,400 ±$26,428 | $552,100 | no clear change |
| Median gross rent | $2,171 ±$314 | $2,033 | no clear change |
| Renters paying 35% or more of income on rent | 47.7% ±41.7 pts | 40.5% | – |
| Median monthly owner costs, with a mortgage | $3,913 ±$218 | $3,156 | – |
| Owner-occupied homes | 96.0% ±2.4 pts | 74.3% | no clear change |
| Renter-occupied homes | 4.0% ±2.4 pts | 25.7% | – |
| Housing units | 4,173 ±265 | 133,639 | no clear change |
| Homeowner vacancy rate | 0.0% ±1.1 pts | 0.3% | – |
| Rental vacancy rate | 18.2% ±24.7 pts | 2.0% | – |
| Single-family detached homes | 90.5% ±2.6 pts | 57.8% | – |
| Mobile homes | 0.0% ±1.1 pts | 0.2% | – |
| Built 2020 or later | 0.0% ±1.1 pts | 1.3% | – |
| Built 2010 to 2019 | 2.9% ±1.2 pts | 6.1% | – |
| Built 1939 or earlier | 4.0% ±1.9 pts | 9.3% | – |
| Households with no vehicle | 1.6% ±1.1 pts | 4.0% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Martinsville work and get to work?
64.8% of Martinsville's workers drive alone and 26.0% work from home. The average trip to work takes 34.0 minutes. The unemployment rate in 2020-2024 averaged 2.8%.
| Measure | Martinsville | Somerset County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 61.9% ±3.4 pts | 70.0% | – |
| Unemployment rate | 2.8% ±1.3 pts | 4.7% | no clear change |
| Drove alone to work | 64.8% ±3.7 pts | 63.8% | – |
| Carpooled | 2.9% ±1.4 pts | 6.5% | – |
| Public transportation | 4.3% ±2.0 pts | 3.4% | – |
| Walked | 0.3% ±0.4 pts | 1.2% | – |
| Worked from home | 26.0% ±3.4 pts | 22.7% | +17.3 pts |
| Mean travel time to work | 34.0 min ±2.8 | 31.4 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Martinsville?
3 census tracts lie mostly in Martinsville, and 1 more reaches into it (2020 census blocks). Their median household incomes run from $187,169 (Tract 509.01) to $249,803 (Tract 509.03).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 509.03Somerset County | 5,059 | $249,803 |
| Tract 509.01Somerset County | 5,090 | $187,169 |
| Tract 509.02Somerset County | 3,486 | $216,071 |
| Tract 510Somerset County | 7,419 | $118,455 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Martinsville) · Census block assignment files
How does Martinsville compare with other places in New Jersey?
Martinsville ranks 60th of 771 places in New Jersey with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 249th | 787 |
| Residents per square mile | 573rd | 787 |
| Median household income | 60th | 771 |
| Per capita income | 66th | 785 |
| Median home value | 110th | 777 |
| Median gross rent | 151st | 701 |
| Bachelor's degree or higher | 86th | 780 |
| Median age | 251st | 786 |
| Owner-occupied share | 54th | 777 |
| Work from home | 130th | 695 |
| Travel time to work | 180th | 787 |
Martinsville's figures with every place in New Jersey (CSV)
Every place in New Jersey, sortable · Compare Martinsville with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Martinsville?
16 of the 57 figures for Martinsville on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Martinsville are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.