Census tract · Somerset County
Census Tract 509.03, Somerset County, New Jersey
Census Tract 509.03, GEOID 34035050903, in Somerset County, New Jersey, entirely within Martinsville and Bridgewater Township. 5,059 residents in the ACS 2020-2024 5-year estimates (±448); the 2020 Census counted 5,395.
Residents, 2020-2024
5,059
±448 (90% margin)
2020 Census count: 5,395
Median household income
$249,803
±$32,401 (90% margin)
Somerset County: $140,374
Median home value
$876,500
±$48,050 (90% margin)
Somerset County: $552,100
Median gross rent
not published
Somerset County: $2,033
Where is Census Tract 509.03?
Census Tract 509.03 is one of 74 census tracts in Somerset County, New Jersey. It covers 5.50 square miles of land, 980 residents per square mile in 2020. Its GEOID, 34035050903, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Martinsville | 100% |
| Bridgewater Township | 100% |
4 census tracts border Census Tract 509.03: Tract 509.01 ($187,169), Tract 509.02 ($216,071), Tract 522.03 ($250,000 or more) and Tract 526.04 ($212,841). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 509.03?
The 2020-2024 American Community Survey puts Census Tract 509.03's population at 5,059 (±448) in 1,725 households; the 2020 Census counted 5,395 residents and 1,883 housing units.
| Measure | Tract 509.03 | Martinsville |
|---|---|---|
| Total population | 5,059 ±448 | 11,559 |
| Households | 1,725 ±137 | 4,054 |
| Average household size | 2.92 ±0.18 | 2.82 |
| Housing units | 1,809 ±124 | 4,173 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 509.03?
The median resident of Census Tract 509.03 is 45.5 years old; 23.2% are under 18 and 19.4% are 65 or older. The largest group is non-Hispanic white residents at 65.3%, then non-Hispanic Asian residents at 21.6%. 19.2% of residents were born outside the United States.
| Measure | Tract 509.03 | Martinsville |
|---|---|---|
| Median age | 45.5 ±3.3 | 45.1 |
| Under 18 years | 23.2% ±3.0 pts | 24.0% |
| 65 years and over | 19.4% ±3.7 pts | 21.7% |
| Hispanic or Latino (any race) | 3.0% ±2.2 pts | 8.0% |
| White alone, not Hispanic | 65.3% ±6.9 pts | 65.6% |
| Black or African American alone, not Hispanic | 0.3% ±0.6 pts | 1.0% |
| Asian alone, not Hispanic | 21.6% ±5.3 pts | 16.8% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.9 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.9 pts | 0.0% |
| Two or more races, not Hispanic | 9.8% ±4.7 pts | 7.4% |
| Some other race alone, not Hispanic | 0.0% ±0.1 pts | 1.2% |
| Born outside the United States | 19.2% ±4.6 pts | 18.7% |
| Speak a language other than English at home (age 5+) | 21.6% ±5.6 pts | 22.1% |
| Civilian veterans (age 18+) | 2.6% ±1.9 pts | 3.4% |
| With a disability | 5.5% ±2.2 pts | 7.3% |
| No health insurance coverage | 0.4% ±0.4 pts | 0.7% |
| High school graduate or higher (age 25+) | 100.0% ±0.1 pts | 98.6% |
| Bachelor's degree or higher (age 25+) | 78.2% ±5.4 pts | 70.9% |
| Graduate or professional degree (age 25+) | 39.5% ±5.4 pts | 33.1% |
| Lived in the same house a year earlier | 97.0% ±3.1 pts | 97.4% |
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 Census Tract 509.03 earn?
Half of the 1,725 households in Census Tract 509.03 earn less than $249,803 a year (±$32,401), against $140,374 across Somerset County: 5th highest of the county's 74 tracts with a reliable estimate.
| Measure | Tract 509.03 | Martinsville |
|---|---|---|
| Median household income | $249,803 ±$32,401 | $205,000 |
| Mean household income | $307,649 ±$32,561 | $257,831 |
| Per capita income | $105,574 ±$12,966 | $91,066 |
| People below the poverty line | 0.8% ±0.6 pts | 1.4% |
| Children under 18 below the poverty line | 0.0% ±3.8 pts | 1.9% |
| Households receiving SNAP | 0.0% ±2.6 pts | 2.4% |
| Households with a computer | 99.2% ±1.2 pts | 98.9% |
| Households with a broadband subscription | 99.2% ±1.2 pts | 97.3% |
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 Census Tract 509.03?
Owners occupy 99.0% of Census Tract 509.03's occupied homes and renters 1.0%. The median owner-occupied home is valued at $876,500 by its owner (±$48,050).
| Measure | Tract 509.03 | Martinsville |
|---|---|---|
| Median home value (owner-occupied) | $876,500 ±$48,050 | $720,400 |
| Median monthly owner costs, with a mortgage | $4,000 or more | $3,913 |
| Owner-occupied homes | 99.0% ±1.3 pts | 96.0% |
| Renter-occupied homes | 1.0% ±1.3 pts | 4.0% |
| Housing units | 1,809 ±124 | 4,173 |
| Single-family detached homes | 96.6% ±2.5 pts | 90.5% |
| Mobile homes | 0.0% ±2.5 pts | 0.0% |
| Built 2020 or later | 0.0% ±2.5 pts | 0.0% |
| Built 2010 to 2019 | 3.7% ±1.9 pts | 2.9% |
| Built 1939 or earlier | 3.4% ±2.2 pts | 4.0% |
| Households with no vehicle | 1.3% ±1.5 pts | 1.6% |
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 Census Tract 509.03 get to work?
65.2% of Census Tract 509.03's workers drive alone and 26.6% work from home. The average trip to work takes 32.6 minutes.
| Measure | Tract 509.03 | Martinsville |
|---|---|---|
| In the labor force (age 16+) | 62.6% ±4.7 pts | 61.9% |
| Unemployment rate | 4.1% ±2.9 pts | 2.8% |
| Drove alone to work | 65.2% ±5.4 pts | 64.8% |
| Carpooled | 3.4% ±2.1 pts | 2.9% |
| Public transportation | 2.8% ±2.0 pts | 4.3% |
| Walked | 0.7% ±0.9 pts | 0.3% |
| Worked from home | 26.6% ±6.1 pts | 26.0% |
| Mean travel time to work | 32.6 min ±3.3 | 34.0 min |
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
How does Census Tract 509.03 compare with the other tracts in Somerset County?
Among Somerset County's tracts with a reliable estimate, Census Tract 509.03 ranks as shown below (1 = highest).
| Measure | In Somerset County | In Martinsville |
|---|---|---|
| Population | 29th of 74 | 2nd of 3 |
| Residents per square mile | 52nd of 74 | 2nd of 3 |
| Median household income | 5th of 74 | 1st of 3 |
| Per capita income | 8th of 74 | 1st of 3 |
| Median home value | 7th of 74 | 1st of 3 |
| Bachelor's degree or higher | 4th of 74 | 1st of 3 |
| Median age | 20th of 74 | 1st of 3 |
| Owner-occupied share | 1st of 74 | 1st of 3 |
The tracts next to it on Somerset County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 509.03 | 5th | $249,803±$32,401 |
| Tract 527.01 | 6th | $245,441±$20,995 · within the margin of this tract |
| Tract 542.02 | 7th | $230,563±$42,109 · within the margin of this tract |
| Tract 539.05 | 8th | $224,900±$12,337 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 509.03?
3 of the 17 figures for Census Tract 509.03 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.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). 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 · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections