Census tract · Union County
Census Tract 339, Union County, New Jersey
Census Tract 339, GEOID 34039033900, in Union County, New Jersey, entirely within Roselle Park. 3,313 residents in the ACS 2020-2024 5-year estimates (±531); the 2020 Census counted 3,322.
Residents, 2020-2024
3,313
±531 (90% margin)
2020 Census count: 3,322
Median household income
$81,892
±$26,643 (90% margin)
Union County: $103,202
Median home value
$458,900
±$30,811 (90% margin)
Union County: $529,200
Median gross rent
$1,763
±$178 (90% margin)
Union County: $1,730
Where is Census Tract 339?
Census Tract 339 is one of 120 census tracts in Union County, New Jersey. It covers 0.33 square miles of land, 10,190 residents per square mile in 2020. Its GEOID, 34039033900, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Roselle Park | 100% |
4 census tracts border Census Tract 339: Tract 337 ($126,589), Tract 338 ($105,742), Tract 340 ($73,171) and Tract 372 ($101,109). 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 339?
The 2020-2024 American Community Survey puts Census Tract 339's population at 3,313 (±531) in 1,388 households; the 2020 Census counted 3,322 residents and 1,267 housing units.
| Measure | Tract 339 | Roselle Park |
|---|---|---|
| Total population | 3,313 ±531 | 14,093 |
| Households | 1,388 ±160 | 5,408 |
| Average household size | 2.38 ±0.29 | 2.61 |
| Housing units | 1,421 ±153 | 5,522 |
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 339?
The median resident of Census Tract 339 is 37.9 years old; 20.2% are under 18 and 10.3% are 65 or older. The largest group is Hispanic or Latino residents (of any race) at 40.6%, then non-Hispanic white residents at 32.2%. 40.7% of residents were born outside the United States.
| Measure | Tract 339 | Roselle Park |
|---|---|---|
| Median age | 37.9 ±7.7 | 39.8 |
| Under 18 years | 20.2% ±6.0 pts | 19.7% |
| 65 years and over | 10.3% ±2.8 pts | 14.7% |
| Hispanic or Latino (any race) | 40.6% ±11.5 pts | 32.2% |
| White alone, not Hispanic | 32.2% ±9.1 pts | 40.3% |
| Black or African American alone, not Hispanic | 12.6% ±8.0 pts | 9.6% |
| Asian alone, not Hispanic | 8.4% ±4.3 pts | 14.0% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.3 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.3 pts | 0.0% |
| Two or more races, not Hispanic | 6.2% ±3.0 pts | 2.6% |
| Some other race alone, not Hispanic | 0.0% ±0.1 pts | 1.3% |
| Born outside the United States | 40.7% ±8.2 pts | 36.7% |
| Speak a language other than English at home (age 5+) | 60.2% ±8.8 pts | 50.9% |
| Civilian veterans (age 18+) | 2.0% ±1.4 pts | 1.4% |
| With a disability | 9.9% ±3.5 pts | 8.6% |
| No health insurance coverage | 17.2% ±7.1 pts | 9.2% |
| High school graduate or higher (age 25+) | 90.1% ±5.5 pts | 92.1% |
| Bachelor's degree or higher (age 25+) | 34.1% ±7.7 pts | 38.5% |
| Graduate or professional degree (age 25+) | 11.8% ±5.1 pts | 16.0% |
| Lived in the same house a year earlier | 91.3% ±5.1 pts | 89.0% |
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 339 earn?
Half of the 1,388 households in Census Tract 339 earn less than $81,892 a year (±$26,643), against $103,202 across Union County: 83rd highest of the county's 118 tracts with a reliable estimate. 17.4% of residents live below the poverty line.
| Measure | Tract 339 | Roselle Park |
|---|---|---|
| Median household income | $81,892 ±$26,643 | $109,679 |
| Mean household income | $105,032 ±$13,462 | $135,068 |
| Per capita income | $41,953 ±$7,140 | $51,791 |
| People below the poverty line | 17.4% ±10.0 pts | 6.6% |
| Children under 18 below the poverty line | 40.9% ±23.8 pts | 10.3% |
| Households receiving SNAP | 5.4% ±4.7 pts | 4.4% |
| Households with a computer | 94.8% ±5.8 pts | 97.5% |
| Households with a broadband subscription | 95.1% ±3.8 pts | 95.1% |
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 339?
Owners occupy 29.5% of Census Tract 339's occupied homes and renters 70.5%. The median owner-occupied home is valued at $458,900 by its owner (±$30,811). The median renter pays $1,763 a month including utilities, and 29.3% of renters pay 35% or more of their income on rent.
| Measure | Tract 339 | Roselle Park |
|---|---|---|
| Median home value (owner-occupied) | $458,900 ±$30,811 | $443,200 |
| Median gross rent | $1,763 ±$178 | $1,663 |
| Renters paying 35% or more of income on rent | 29.3% ±11.5 pts | 29.3% |
| Median monthly owner costs, with a mortgage | $3,093 ±$209 | $2,871 |
| Owner-occupied homes | 29.5% ±7.9 pts | 59.1% |
| Renter-occupied homes | 70.5% ±7.9 pts | 40.9% |
| Housing units | 1,421 ±153 | 5,522 |
| Single-family detached homes | 26.0% ±9.7 pts | 55.8% |
| Mobile homes | 0.0% ±3.1 pts | 0.0% |
| Built 2020 or later | 4.0% ±4.5 pts | 1.0% |
| Built 2010 to 2019 | 8.4% ±5.7 pts | 2.2% |
| Built 1939 or earlier | 37.7% ±10.8 pts | 28.0% |
| Households with no vehicle | 10.7% ±5.4 pts | 4.5% |
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 339 get to work?
59.8% of Census Tract 339's workers drive alone and 10.0% work from home. The average trip to work takes 28.8 minutes. The unemployment rate in 2020-2024 averaged 5.8%.
| Measure | Tract 339 | Roselle Park |
|---|---|---|
| In the labor force (age 16+) | 81.2% ±4.6 pts | 77.9% |
| Unemployment rate | 5.8% ±3.8 pts | 4.8% |
| Drove alone to work | 59.8% ±8.6 pts | 73.2% |
| Carpooled | 15.8% ±5.8 pts | 6.6% |
| Public transportation | 6.1% ±4.0 pts | 5.9% |
| Walked | 3.3% ±2.8 pts | 1.3% |
| Worked from home | 10.0% ±5.8 pts | 10.7% |
| Mean travel time to work | 28.8 min ±4.6 | 25.8 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 339 compare with the other tracts in Union County?
Among Union County's tracts with a reliable estimate, Census Tract 339 ranks as shown below (1 = highest).
| Measure | In Union County | In Roselle Park |
|---|---|---|
| Population | 107th of 120 | 3rd of 3 |
| Residents per square mile | 48th of 120 | 3rd of 3 |
| Median household income | 83rd of 118 | 3rd of 3 |
| Per capita income | 65th of 119 | 3rd of 3 |
| Median home value | 56th of 115 | 1st of 3 |
| Median gross rent | 58th of 113 | 1st of 3 |
| Poverty rate | 23rd of 64 | 1st of 1 |
| Bachelor's degree or higher | 56th of 114 | 3rd of 3 |
| Median age | 76th of 120 | 2nd of 3 |
| Owner-occupied share | 94th of 115 | 3rd of 3 |
The tracts next to it on Union County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 392 | 80th | $83,828±$35,226 · within the margin of this tract |
| Tract 388 | 81st | $82,402±$17,108 · within the margin of this tract |
| Tract 349 | 82nd | $82,007±$26,483 · within the margin of this tract |
| Tract 339 | 83rd | $81,892±$26,643 |
| Tract 320.02 | 84th | $81,532±$27,067 · within the margin of this tract |
| Tract 323 | 85th | $80,446±$10,687 · within the margin of this tract |
| Tract 352 | 86th | $75,972±$22,020 · 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 339?
Every figure for Census Tract 339 on this page has a coefficient of variation under 40%, the Census Bureau's threshold for a usable estimate.
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