Census tract · Union County
Census Tract 331, Union County, New Jersey
Census Tract 331, GEOID 34039033100, in Union County, New Jersey, entirely within Union Township, Union County. 6,397 residents in the ACS 2020-2024 5-year estimates (±825); the 2020 Census counted 5,957.
Residents, 2020-2024
6,397
±825 (90% margin)
2020 Census count: 5,957
Median household income
$119,970
±$39,346 (90% margin)
Union County: $103,202
Median home value
$443,600
±$31,499 (90% margin)
Union County: $529,200
Median gross rent
$1,828
±$178 (90% margin)
Union County: $1,730
Where is Census Tract 331?
Census Tract 331 is one of 120 census tracts in Union County, New Jersey. It covers 0.63 square miles of land, 9,426 residents per square mile in 2020. Its GEOID, 34039033100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Union Township, Union County | 100% |
| Union | 27% |
| Connecticut Farms | 14% |
6 census tracts border Census Tract 331: Tract 326 ($107,917), Tract 327.01 ($136,648), Tract 327.02 ($98,973), Tract 330 ($149,152), Tract 332 ($130,909) and Tract 333 ($127,086). 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 331?
The 2020-2024 American Community Survey puts Census Tract 331's population at 6,397 (±825) in 2,021 households; the 2020 Census counted 5,957 residents and 2,158 housing units.
| Measure | Tract 331 | Union Township, Union County |
|---|---|---|
| Total population | 6,397 ±825 | 61,071 |
| Households | 2,021 ±178 | 21,374 |
| Average household size | 3.16 ±0.32 | 2.78 |
| Housing units | 2,144 ±174 | 22,068 |
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 331?
The median resident of Census Tract 331 is 39.7 years old; 16.1% are under 18 and 10.0% are 65 or older. The largest group is non-Hispanic Black residents at 33.4%, then Hispanic or Latino residents (of any race) at 23.6%. 54.1% of residents were born outside the United States.
| Measure | Tract 331 | Union Township, Union County |
|---|---|---|
| Median age | 39.7 ±3.7 | 41.5 |
| Under 18 years | 16.1% ±3.3 pts | 19.1% |
| 65 years and over | 10.0% ±3.3 pts | 16.1% |
| Hispanic or Latino (any race) | 23.6% ±5.8 pts | 19.3% |
| White alone, not Hispanic | 11.6% ±4.8 pts | 26.9% |
| Black or African American alone, not Hispanic | 33.4% ±8.9 pts | 37.1% |
| Asian alone, not Hispanic | 20.7% ±6.2 pts | 10.3% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.7 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.7 pts | 0.0% |
| Two or more races, not Hispanic | 3.8% ±2.6 pts | 4.6% |
| Some other race alone, not Hispanic | 7.0% ±4.9 pts | 1.7% |
| Born outside the United States | 54.1% ±7.0 pts | 37.1% |
| Speak a language other than English at home (age 5+) | 69.4% ±10.2 pts | 48.1% |
| Civilian veterans (age 18+) | 1.8% ±1.4 pts | 2.2% |
| With a disability | 9.7% ±2.9 pts | 9.4% |
| No health insurance coverage | 18.4% ±7.2 pts | 7.2% |
| High school graduate or higher (age 25+) | 78.9% ±7.1 pts | 89.1% |
| Bachelor's degree or higher (age 25+) | 34.5% ±9.9 pts | 40.8% |
| Graduate or professional degree (age 25+) | 8.3% ±3.3 pts | 13.8% |
| Lived in the same house a year earlier | 84.9% ±7.6 pts | 90.7% |
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 331 earn?
Half of the 2,021 households in Census Tract 331 earn less than $119,970 a year (±$39,346), against $103,202 across Union County: 43rd highest of the county's 118 tracts with a reliable estimate.
| Measure | Tract 331 | Union Township, Union County |
|---|---|---|
| Median household income | $119,970 ±$39,346 | $119,464 |
| Mean household income | $132,445 ±$17,856 | $138,435 |
| Per capita income | $42,308 ±$5,993 | $48,896 |
| People below the poverty line | 8.8% ±6.7 pts | 6.7% |
| Children under 18 below the poverty line | 18.2% ±17.9 pts | 6.7% |
| Households receiving SNAP | 5.2% ±5.3 pts | 5.9% |
| Households with a computer | 99.1% ±1.1 pts | 95.9% |
| Households with a broadband subscription | 96.3% ±4.1 pts | 94.5% |
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 331?
Owners occupy 66.9% of Census Tract 331's occupied homes and renters 33.1%. The median owner-occupied home is valued at $443,600 by its owner (±$31,499). The median renter pays $1,828 a month including utilities, and 47.3% of renters pay 35% or more of their income on rent.
| Measure | Tract 331 | Union Township, Union County |
|---|---|---|
| Median home value (owner-occupied) | $443,600 ±$31,499 | $451,300 |
| Median gross rent | $1,828 ±$178 | $2,064 |
| Renters paying 35% or more of income on rent | 47.3% ±18.7 pts | 45.7% |
| Median monthly owner costs, with a mortgage | $2,640 ±$263 | $3,015 |
| Owner-occupied homes | 66.9% ±6.5 pts | 71.5% |
| Renter-occupied homes | 33.1% ±6.5 pts | 28.5% |
| Housing units | 2,144 ±174 | 22,068 |
| Single-family detached homes | 67.3% ±6.5 pts | 62.7% |
| Mobile homes | 0.0% ±2.1 pts | 0.3% |
| Built 2020 or later | 3.5% ±3.1 pts | 0.9% |
| Built 2010 to 2019 | 6.3% ±4.8 pts | 4.9% |
| Built 1939 or earlier | 22.7% ±7.0 pts | 20.4% |
| Households with no vehicle | 2.3% ±2.3 pts | 5.6% |
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 331 get to work?
60.0% of Census Tract 331's workers drive alone and 19.5% work from home. The average trip to work takes 33.7 minutes. The unemployment rate in 2020-2024 averaged 12.7%.
| Measure | Tract 331 | Union Township, Union County |
|---|---|---|
| In the labor force (age 16+) | 77.7% ±4.0 pts | 70.2% |
| Unemployment rate | 12.7% ±6.2 pts | 5.9% |
| Drove alone to work | 60.0% ±10.2 pts | 66.9% |
| Carpooled | 7.4% ±5.5 pts | 7.6% |
| Public transportation | 8.6% ±4.6 pts | 8.6% |
| Walked | 2.1% ±2.3 pts | 1.5% |
| Worked from home | 19.5% ±9.5 pts | 12.2% |
| Mean travel time to work | 33.7 min ±4.2 | 30.4 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 331 compare with the other tracts in Union County?
Among Union County's tracts with a reliable estimate, Census Tract 331 ranks as shown below (1 = highest).
| Measure | In Union County |
|---|---|
| Population | 16th of 120 |
| Residents per square mile | 53rd of 120 |
| Median household income | 43rd of 118 |
| Per capita income | 63rd of 119 |
| Median home value | 66th of 115 |
| Median gross rent | 48th of 113 |
| Bachelor's degree or higher | 55th of 114 |
| Median age | 57th of 120 |
| Owner-occupied share | 43rd of 115 |
The tracts next to it on Union County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 337 | 40th | $126,589±$24,040 · within the margin of this tract |
| Tract 329.01 | 41st | $126,119±$5,173 · within the margin of this tract |
| Tract 342 | 42nd | $120,833±$36,920 · within the margin of this tract |
| Tract 331 | 43rd | $119,970±$39,346 |
| Tract 354 | 44th | $118,954±$31,953 · within the margin of this tract |
| Tract 336 | 45th | $118,611±$32,324 · within the margin of this tract |
| Tract 329.02 | 46th | $113,468±$19,129 · 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 331?
1 of the 18 figures for Census Tract 331 on this page carries a coefficient of variation over 40% and is 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